Migration
One of the largest forces reshaping politics in nearly every receiving country. The data on who moves where and why, and what is driving the next wave.
(roughly 3.6% of the world's population; up from about 2.3% in 1970)
(roughly four times total global foreign aid)
(highest since 1910; roughly equal in Germany; higher in Australia and Canada)
A note on framing. Migration is one of the most politically charged topics in modern politics, and one where the slogans on every side obscure what the data actually shows. The page below tries to walk through the structural picture - how many people move, where they go, why, and what the genuine trade-offs are - in a way that respects readers across the political spectrum. There are real benefits and real costs; pretending only the benefits or only the costs are real is the failure of every loud framing of this topic.
The actual size and shape of global migration
About 280 million people live outside the country they were born in. That sounds like a lot in absolute terms and is a lot in absolute terms. As a share of the world's population it has been remarkably stable - around 3-3.5% for over a century, with modest variation up and down depending on the period. The big change has not been in the share of humans who migrate; it has been in where they go and how visible the flows are in receiving-country politics.
Where the migrants are. About 51 million in the United States, the largest single concentration. About 16 million in Germany. About 14 million in Saudi Arabia (mostly temporary labour migrants). About 9 million each in the UK and France. About 8 million each in Russia, Australia, Canada, and the UAE. Several million each in Spain, Italy, the Netherlands, and Singapore. The receiving countries are concentrated in the rich world, the Gulf states, and a few middle-income hubs.
Where the migrants come from. India sends the largest single number (about 18 million Indians live abroad). Mexico is second (about 12 million). Russia, China, Bangladesh, and Pakistan all send several million. Smaller countries send proportionally larger shares - 1.7 million Salvadorans (about 25% of the country's population) live abroad, similar shares for several Caribbean countries, smaller central Asian states, and a long list of others. The "diaspora as a share of the home country" measure tells the human-scale story better than absolute numbers do.
The flows are not all the same. Roughly two-thirds of international migrants are economic migrants - people who left their country looking for better wages, better jobs, or family reunion. About 30 million are formally classified as refugees (people forced to flee conflict or persecution and unable to return). The rest are a mix of students, retirees, professionals on global assignment, and the long tail of less easily categorised flows. Most migrants are working-age adults; most are men slightly more often than women, though specific corridors (Filipino domestic workers, for example) flip that ratio sharply.
Why people actually move
Most contemporary migration is driven by a small set of factors that operate fairly consistently across most flows. Understanding them helps cut through the political conversation, which often emphasises whichever specific factor is rhetorically convenient.
Wage gaps. The single largest driver. A working-age person who can earn five to ten times as much in another country than at home has powerful incentives to move. Most economic migration is fundamentally about the ratio of wages between the destination and the origin. The gap has been the largest variable in nearly every major migration corridor of the last 40 years - Mexico-US, Turkey-Germany, Bangladesh-Gulf, Philippines-everywhere, Eastern Europe-Western Europe.
Family reunification. Once a migrant establishes themselves in a destination country, family members tend to follow. Spouses, children, parents, siblings. This compounds initial migration into substantially larger long-run flows. Family-reunification visas account for roughly half of permanent migration to the US, Canada, and Australia in most years.
Conflict and persecution. The forced-migration drivers. The Syrian war alone displaced about 13 million people internally and across borders. The post-2022 Russia-Ukraine war displaced roughly 10 million Ukrainians. The Venezuelan crisis has produced roughly 8 million emigrants. Earlier waves from Afghanistan, Iraq, Somalia, Eritrea, Myanmar, and many others have produced cumulatively tens of millions of refugees over the post-WWII period. These flows are sharper, more visible, and more politically explosive than slow economic migration but are typically a smaller share of total movement.
Education and opportunity. Several million students study abroad each year. Many stay for at least part of their working lives. The "brain drain" from developing countries to developed ones is real but the returning-home flows ("brain circulation") have been growing as developing economies have become more attractive employers. Indian-American technology executives returning home, Chinese-American academics taking positions in Chinese universities, and similar patterns are part of the modern picture.
Climate stress. A growing factor that has not yet shown up at scale in most data but is starting to. Drought in Central America's Dry Corridor, Sahel desertification, sea-level pressure on small island states, and other climate-driven displacement is currently producing internal-displacement flows that mostly stay within borders. Whether this scales into substantial international flows over the next 20 years is one of the most consequential open questions in migration projection.
The political economics of remittances
Migrants send home roughly $830 billion a year in formal remittances, plus another estimated $100-200 billion through informal channels. This is one of the largest financial flows in the world economy and the largest single source of foreign income for many developing countries. The Philippines receives about $40 billion a year. Mexico receives about $65 billion. India receives about $130 billion. Egypt, Bangladesh, Nigeria, Pakistan, and several others each receive over $20 billion. For some smaller countries (Tonga, Tajikistan, Lebanon, El Salvador, Honduras, Nepal), remittances exceed 20% of national income.
What this means structurally. Remittances are larger and more stable than foreign aid for almost every country that receives them in significant amounts. They go directly to families rather than through governments, which is both an efficiency advantage (less corruption loss) and a development concern (less coordination on broader programmes). The economies of many smaller countries depend on emigrants' wages earned in richer countries, which makes those countries structurally exposed to receiving-country migration policy in ways the official statistics do not always capture.
For receiving countries, the migration-and-remittance picture is more complicated than the political conversation often acknowledges. The wages migrants earn are largely spent locally (rent, food, transport, taxes); the remitted portion is the savings that go home, typically a smaller share than total earnings. The argument that migrants "send all their money home" is consistently wrong on the data. The argument that migrants are pure economic gain is also wrong; they use public services, compete for housing, and add to specific labour-market segments. Both effects are real and need to be priced honestly.
The receiving-country political dynamics
Migration produces political backlash in nearly every receiving country once flows reach a level that makes the changes visible to native-born populations. The pattern has been remarkably consistent across very different countries: a period of fairly liberal policy, followed by rising public concern as composition change becomes visible, followed by political mobilisation against further migration, followed by tightened policy, followed by either successful reduction in flows or further political escalation when flows do not reduce. The cycle has played out in the US, the UK, France, Germany, Sweden, the Netherlands, Australia, and increasingly across most of the rich world.
What drives the backlash. Partly genuine concerns about labour-market competition, housing pressure, public-service strain, and cultural change. Partly political opportunism - migration is one of the easier issues to mobilise on, regardless of whether the specific concerns are well-founded. Partly real failures of integration in specific cases that get generalised. The mix varies country by country and within country by region, with the strongest backlash typically in working-class and lower-middle-class areas where direct competition for jobs and housing is highest.
What the data actually says about the economic effects. The professional consensus across most rich countries is that migration is a net positive for the receiving economy in aggregate, though the gains are uneven. Migrants fill labour shortages in agriculture, hospitality, construction, healthcare, and skilled-technical fields that local labour markets struggle with. They are more entrepreneurial than native-born populations on average. They expand the tax base. They fill demographic gaps in aging societies. The aggregate effects are positive enough that most economists across the political spectrum agree on the basic picture.
What the data also says. The benefits are not evenly distributed. Native-born workers in directly competing low-wage segments (construction, restaurant work, certain manufacturing) face wage pressure. Specific neighbourhoods absorb most of the integration costs while the benefits diffuse to broader populations. Housing markets in receiving cities tighten. Public services in some specific localities are strained. Pretending these costs are not real or are entirely the result of bad faith is a political failure that has consistently produced worse migration outcomes than honest engagement would have.
Climate-driven migration
The relationship between climate change and migration is one of the most contested questions in migration studies. The simple story - rising temperatures and rising seas force mass migration - turns out to be considerably more complicated when examined carefully. Most climate displacement so far has been internal rather than international (people moving within their country to less-affected areas). The World Bank's Groundswell projections estimate up to 216 million internal climate migrants in just the largest affected regions by 2050. International climate migration is harder to project because it depends on political conditions in receiving countries that are themselves climate-stressed.
What is actually happening. Sub-Saharan African migration patterns are increasingly affected by Sahel desertification and East African drought. Central American migration to the US has been documented to track precipitation patterns in the Dry Corridor (Guatemala, Honduras, El Salvador). South Asian internal migration responds to monsoon variability and coastal flooding. Pacific small island states face genuine existential threats from sea-level rise that will produce migration as the islands become uninhabitable. Mediterranean crossings include people fleeing both conflict and increasingly severe drought.
What the projections suggest. Most careful migration researchers expect climate to increase migration meaningfully but not catastrophically. The largest flows will probably continue to be driven by economic and conflict factors with climate as a contributor rather than the dominant cause. Adaptation in vulnerable countries can reduce displacement substantially. Climate-driven international migration to the rich world is real and growing, but the headline numbers in apocalyptic projections often confuse internal-displacement totals with international flows. Climate migration is a serious problem; it is not yet the demographic catastrophe some framings suggest.
How countries actually compare
Migration patterns vary dramatically across countries, both in scale and in policy. The numbers below are 2024-2025 estimates.
The takeaway: high-migration receiving countries have produced very different policy approaches with different outcomes. The Australian-Canadian model (active selection, broad public acceptance, high per-capita rates) has worked notably well. The Gulf model (temporary labour with no settlement) is economically functional but creates an underclass. The European model (a mix of asylum, family reunification, and labour) has produced more political backlash than the active-selection countries. The Japanese model (very low migration) is internally cohesive but pays the demographic price.
The paths from here
Migration is one of the topics where the next decade is likely to look meaningfully different from the last. The structural pressures are intensifying, the political environments are evolving, and the policy tools available are being tested in new ways. Each path below is one realistic shape the period could take.
Continued politically-managed flows
Most rich democracies maintain mid-level migration with periodic adjustments based on political conditions. Asylum and refugee processing continues. Family reunification continues. Skilled-worker visas continue. Total flows fluctuate around current levels with country-specific variation. The political conversation stays loud without producing major changes in actual numbers.
Will it happen? This is the base case for most rich countries. The structural drivers (wage gaps, family reunification, demographic demand for labour) have not weakened. Political restriction efforts have produced noisy headlines without dramatic changes in the underlying numbers in most cases.
Significant tightening in major receiving countries
The political backlash produces real reductions in legal migration channels in the US, UK, several European countries, and elsewhere. Asylum processing tightens. Skilled-worker visas become harder. Family reunification slows. Total inflows fall meaningfully for the first time in 30 years. The countries pay measurable demographic and labour-market costs.
Will it happen? Possible. The Trump administration's policies, the post-Brexit UK adjustments, the AfD-pushed German changes, and similar movements in several countries point this direction. Whether the tightening sustains depends on how quickly the labour-market and demographic costs become visible to voters who currently support the restriction.
Climate-driven flows scale up substantially
Drought in the Dry Corridor, Sahel, parts of South Asia, and elsewhere intensifies. Sea-level pressure on small island states becomes unavoidable. Internal displacement spills into international migration as receiving regions within affected countries themselves come under stress. The number of climate-driven migrants reaches the tens of millions annually in the second half of the 2030s.
Will it happen? The scale is genuinely uncertain. The lower-bound projections (climate as a contributor to existing migration) are likely; the higher-bound projections (mass climate migration as the dominant flow) are less likely but cannot be ruled out. Adaptation investment in vulnerable countries is the variable that most affects which way the projections come out.
More countries adopt active-selection policies
The Australian-Canadian points-based model spreads. Receiving countries shift from passively accepting whoever arrives to actively selecting for skills, language, education, and likely integration outcomes. Public acceptance rises with active selection. Total migration may stay roughly the same or rise; the composition changes.
Will it happen? Some movement is visible. The UK's post-Brexit points system was an attempt at this. Several European countries have introduced more selection. Whether this becomes the dominant model depends partly on labour-market conditions (selection is easier when there is excess applicant demand) and on political conditions in each country.
A coordinated international migration framework
Some kind of coordinated approach to managing migration emerges through the UN system, the EU, the African Union, or some other multilateral forum. Burden-sharing for refugee processing. Shared standards for selection. Climate-displacement framework agreements. The chaotic country-by-country pattern is replaced with something more managed.
Will it happen? Mostly tried and mostly failed historically. The 2018 Global Compact on Migration was a partial attempt with limited bite. The political appetite for binding international agreements on migration is generally low. Possible if a major crisis forces the conversation, but not the base case.
Diaspora-driven economic and political networks expand
The Indian, Chinese, Mexican, Filipino, and other major diaspora communities continue to grow in significance. Remittances scale further. Investment flows from diaspora populations into home-country economies become major. Diaspora political voices in receiving countries shape both domestic and bilateral policy. The "global Indian" or "global Chinese" identity becomes economically and politically more salient.
Will it happen? Already happening. The pattern is visible in most major diaspora communities. The longer-run question is whether the diaspora identity strengthens or weakens across generations - the second-and-third-generation pattern varies, with some communities maintaining strong home-country ties and others assimilating fully.
A serious crisis (climate, conflict, pandemic) reshapes the picture
A specific shock - a major climate event, a regional war, a global pandemic, a financial crisis - produces a migration response that strains receiving countries' capacities. The political response shapes the next decade of migration policy in ways that pre-crisis politics did not predict.
Will it happen? Historically, large migration shifts have been crisis-driven more than gradual. The 2015 European migration crisis from Syria reshaped European politics. The 2022 Ukrainian refugee flow reshaped Polish and broader European responses. Whether and what the next major shock looks like is unpredictable, but some such event in the next decade is more likely than not.
The realistic forecast is, again, a mix. The base case is continued politically-managed flows with country-specific tightening (paths 1 and 2). Climate-driven flows (path 3) intensify gradually. Active selection (path 4) spreads in some countries. The diaspora-economy story (path 6) keeps growing in significance. International coordination (path 5) is unlikely without a forcing crisis (path 7), which itself becomes more likely than the headline statistics suggest.
Where serious analysts disagree
Migration is one of the topics where careful researchers can produce dramatically different conclusions from similar data, partly because the underlying value questions are genuine. Each reading below is held by named scholars worth engaging directly.
Migration is broadly economically positive and the case for more is stronger than the politics admits
The economic gains from migration to receiving countries are large and well-documented. The gains to migrants themselves are enormous - their lifetime earnings can rise by factors of five or ten by moving from low-income to high-income countries. The aggregate effects on receiving economies are positive in nearly every careful study. The political opposition reflects distributional concerns about specific impacts that real policy can address; what is sometimes missed is how much of the rich world's prosperity depends on the labour migrants provide.
Held by: Michael Clemens (Center for Global Development), and a substantial fraction of the economics-of-migration field. The data on aggregate effects supports them; the political case has been weakened by the perception (sometimes correct) that pro-migration economists do not engage seriously with the distributional concerns.
Migration produces real costs to social cohesion that are under-counted
The aggregate economic gains from migration miss what matters most to many receiving-country citizens - the cultural and social cohesion that builds slowly over generations and can be disrupted by rapid composition change. The "we are all economic units" framing of pro-migration economics fails to engage with the genuine value people place on national identity, shared language, common cultural reference points, and the sense that their country is recognisably theirs. Pretending these concerns are illegitimate produces the political backlash that more honest engagement would have avoided.
Held by: David Goodhart ("The Road to Somewhere"), and a tradition of communitarian political theory. The case is uncomfortable for liberal-internationalist analysts and is widely shared by working-class and lower-middle-class voters in many receiving countries. Engaging seriously with it is more useful than dismissing it.
Climate migration will dwarf current flows in the long run
The next 50 years will see migration flows substantially larger than the post-WWII period as climate stress reshapes which parts of the world are habitable. Receiving countries that prepare for this in advance will manage it better; receiving countries that pretend it will not happen will be overwhelmed. The current migration politics is largely irrelevant to what is coming and is wasting political capital on smaller versions of the same conversations.
Held by: Gaia Vince ("Nomad Century"), Parag Khanna ("Move"), and a school of climate-migration analysts. The case is genuinely uncertain in its quantitative form but is increasingly mainstream as a long-run scenario. The argument is most relevant for European, North American, and Australian planning.
The "migration crisis" framing is mostly a political construct
The actual numbers of migrants moving each year are not unprecedented and are not catastrophic in any objective sense. What has changed is the political salience - migration has become the issue that ambitious politicians on both left and right find easiest to mobilise on. The "crisis" framing reflects the politics rather than the underlying data. More careful policy and less politicised conversation could produce substantially better outcomes than the current cycle of moral panic and counter-moral-panic.
Held by: Hein de Haas (Amsterdam, "How Migration Really Works"), and a tradition of empirical migration studies that emphasises how stable the underlying flows have been compared to the political volume. The argument is contested by analysts who think the post-2015 European inflows were a genuine break in pattern.
Active selection is the only durable political solution
Receiving democracies maintain political support for migration only when voters perceive that their government chooses who comes. The chaos of asylum systems where people simply arrive and apply produces backlash regardless of the migrants' actual characteristics. The Australian-Canadian model of explicit selection by skills, language, and likely integration is the only model that has sustained relatively high migration with relatively low political backlash. Other countries should learn from it rather than from each other's failures.
Held by: Christopher Caldwell, parts of the Australian and Canadian policy communities, and an increasingly mainstream pragmatic view in European centre-right parties. The argument is that the political-economy of migration matters as much as the economic-economy of migration, and selection-based systems handle the politics better.
None of these readings is fully right or wrong. What can be said from the available evidence: migration is broadly economically positive but produces real cohesion costs that have been chronically under-priced; climate-driven flows are real and growing; the political conversation is louder than the data warrants; and active selection works better politically than passive acceptance. The countries that handle migration best in the next decade will be the ones that take the data seriously while engaging honestly with the genuine concerns that pro-migration framings often dismiss.
What this means for you
Migration touches everyday life through labour markets, housing markets, public services, the cultural texture of places, and (for many readers) through family or migration history of one's own. A few practical observations:
If you are a citizen of a receiving country
Your country's migration policy is one of its most consequential long-term decisions and is being made through a political conversation that is often disconnected from the data. Voting on specific policy details (selection criteria, asylum process design, integration support, deportation rules) on the merits is more useful than voting on slogans about migration generally. The countries that get migration policy right benefit substantially from it; the countries that handle it poorly pay social and economic costs over decades.
If you are a migrant or have recent migration history in your family
The political environment for migrants in most receiving countries has hardened over the last decade. Specific protections are weaker. Political rhetoric is sharper. The legal complexity of immigration status is higher. Maintaining current legal advice on your specific status, citizenship options, and rights matters more now than it did 15 years ago. The diaspora communities that successful migrants build often outlast specific political cycles and are real social and economic resources worth investing in.
If you are considering migrating
The receiving-country options have narrowed somewhat in the last decade and may narrow further. The countries with active-selection systems (Canada, Australia, parts of Europe) are the most predictable paths if you have the skills and credentials they prioritise. Family-reunification routes remain available where eligible. Asylum is realistic only for genuine refugees from clearly recognised situations. Specific countries (Portugal, Greece, the Gulf states for skilled workers, Mexico for retirees) offer specific pathways that are less politicised than the headline destinations. Doing serious research before committing matters; the specifics are highly country-dependent.
If you live in a sending country
Your country is structurally exposed to receiving-country migration policy in ways that affect remittance flows, family reunification options, and the long-term return-or-stay choices of your diaspora. Government policy that engages thoughtfully with the diaspora (recognising dual citizenship, supporting economic ties, maintaining political channels) tends to produce better outcomes than treating emigrants as having abandoned the country. Voting and engaging on these issues at home matters even when the receiving-country decisions are made elsewhere.
If you are thinking about long-term planning
Migration is one of the variables most likely to reshape the world over the next 30 years. The countries with younger demographics that successfully receive migrants will outperform those that close themselves off. The places where climate stress drives outflows will become structurally different. The diaspora networks will grow in significance. Anyone planning a long career, business, or family decision benefits from taking these structural shifts seriously rather than assuming the current pattern continues. The world of 2055 will probably look meaningfully more migration-shaped than the world of 2025.
The mechanics behind this
The migration story sits on top of three deeper mechanisms covered elsewhere on this site. If the analysis above depends on ideas you want to understand first, these fundamentals make the conversation more legible:
