1. We’re all immigrants
This map from the 2000 Census colors each county according to which country most of its residents cite as their "ancestry." What might be most surprising about this map is the predominance of light yellow in Appalachia; in those counties, more people say their ancestry is simply "American" than anything else. But this is a strikingly recent phenomenon: the number of people saying their ancestry was "American" nearly doubled from 1990 to 2000. It’s amazing that in a country that’s been around for more than 200 years — with many family lineages having lived in the New World for even longer — most people are still able to identify their ancestry based on the countries in which their families lived before they immigrated to the United States.
2. The very first American migration
Erika Tamm et al./PLoS ONE
Even the first Americans were immigrants — it's generally accepted that they came across "Beringia" (the land that's now the Bering Strait, the body of water between Russia and Alaska) at least 20,000 years ago (and possibly as long as 30,000 years ago). But scientists are still trying to piece together when the first Americans came through Beringia; how many of them there were; and whether they came all at once, or in multiple waves.
This map, from a 2007 paper, is based on an analysis of mitochondrial DNA — which children inherit only from their mother, making it easier to trace one line back for many generations. The researchers hypothesize that the group that came to Beringia from Asia, approximately 25,000 years ago, actually stayed in Beringia for some time before some of them came through to the Americas. Then, however — according to this analysis — they populated the Americas fairly quickly, spreading as far south as Chile by 15,000 years ago. The analysis also suggests that some early Americans migrated back to Asia from Beringia, while other, newer waves of immigrants crossed to America.
3. America has more immigrants than anybody
Later waves of European immigration killed off most of the first Americans (largely through European diseases, which traveled through the Americas much more quickly than European humans did). That set the stage for European Americans to rebrand the United States, in particular (where indigenous populations were almost completely "replaced"), as a "nation of immigrants." Even today, America is still home to more total immigrants than any other country in the world. In this map, each country's size is distorted to reflect the size of its immigrant population. It's based on 2005 data, but a 2013 UN report shows that 19.8 percent of the world's international migrants live in the United States.
4. ...but as a share of the population, the US doesn't crack the top ten
As much as American politicians pat themselves on the back for representing "the most welcoming country in the world," there are smaller countries that have been more open to immigrants in recent decades. So on this chart from the Organisation for Economic Co-operation and Development (OECD), which measures the percentage of each country's population that was made up of immigrants in 2000 (orange dot) and 2010 (the blue bar), America doesn't even hit the top ten. Some of the countries that outrank the United States are tiny — it's much easier for 40 percent of Luxembourg's population to be immigrants, since the country has only 540,000 people, than it would be for the United States — but medium-sized countries like Canada, Australia, and Spain also outrank the United States.
5. The simplest explanation of how immigration to America has changed
If this feature were called "A nation of immigrants in one map," this is the one we’d show you. The bottom line: before 1965, Germany sent more immigrants to America than anyone else; after 1965, Mexico did.
Here's why: from World War I to 1965, the immigration system was designed, essentially, to keep the United States white. Rice University sociologist Stephen Klineberg has called it "unbelievable in its clarity of racism." Each country was given a certain quota of immigrants who were allowed to come to the United States each year, based on who'd been in the country in 1890.
Combined with existing laws that prevented any Asian Americans from coming into the country, the laws of the 1920s basically froze the demographics of the immigrant population in place until 1965.
6. The Danish Utahns, and other immigrant enclaves
This gif, compiled by Internet hero @MetricMaps, tracks where immigrants from different countries have settled in the United States. The result is an exhaustive portrait of over 2 dozen different native countries and regions. Some ancestry groups pop up in interesting places, revealing forgotten pockets of American history — the Danish population in Utah, for example, is the result of an extremely early wave of Danish conversion to the Church of Jesus Christ of Latter-Day Saints (Mormons).
7. Forced migration built America
The American myth about "a nation of immigrants" excludes millions of forced migrants to America from Africa, who were brought to the US over two centuries of the transatlantic slave trade. It's hard to overstate how much slaves built America: according to historian Steven Deyle, the value of all slaves in 1860 was seven times the value of all currency then in circulation in the United States. Slave labor built the agrarian economy of the South and fed the cotton mills of the industrializing North. But slaves had no way to become citizens, build wealth, or bring their families — they had no opportunity to practice the self-reliance that America often expects of its immigrants.
8. The first illegal migrations were of trafficked slaves
The forced migration of Africans to America also represents the first unauthorized migration to the United States. The Constitution banned the "importation" (trafficking) of slaves into the United States after 1809, but black-market slave trading continued until the Civil War. According to historian David Eltis of Emory University, 1.5 million Africans arrived in the Americas after the countries they landed in had theoretically banned the slave trade. Because there were no restrictions on voluntary migration to the United States until the 1880s, these were the first people to come to the country illegally.
The Atlas of the Transatlantic Slave Trade documents 78,360 slaves landing in mainland North America from 1800 to 1865 — about 20 percent of all arrivals over the 200 years of the slave trade. (Since slave importation wasn't banned until 1807, many of those arrivals could have been legal.)
9. Modern-day forced migration: human trafficking
Large-scale human trafficking is no longer legal, let alone widely condoned. But it still happens. This graphic is one attempt to map the global reach of the contemporary human-smuggling industry.
A report by the Urban Institute in 2014 interviewed 122 victims of labor trafficking in the United States, and found that 71 percent of those trafficked actually had legal visas when they arrived in the country. But because an immigrant worker's legal status is tied to her employer, most victims who escaped their traffickers had lost their legal status by the time they were connected to law enforcement. Furthermore, the report found, public officials often encountered labor-trafficking victims and failed to realize what was going on — or, worse, sided with the traffickers and threatened to report the victims to federal immigration agents.
10. The most famous immigrant in American history
Give me your tired, your poor;
Your huddled masses yearning to breathe free;
The wretched refuse of your teeming shore;
Send these, the homeless, tempest-toss’d, to me;
I lift my lamp beside the golden door.
—Emma Lazarus, 1883
Of course, the Statue of Liberty was itself an immigrant. It was designed and cast in copper in France over the span of a decade, from 1876 to 1884, as an intended gift from the French government to the United States. But the statue then had to wait in France for several months until the Americans had done enough work on its pedestal. It was then shipped to the United States in 350 separate pieces, housed in 214 crates, to be assembled by American workers once it arrived.
11. An insanely detailed map of immigrants in America from 1903
This exhaustive map includes 51 infographics (for each state plus Washington, DC). The right column of the infographic covers how many immigrants settled in the state each year; the left column shows their occupations. The top depicts the ethnic mix, color-coded by race: Teutonic, Keltic, Slavic, Iberic, Mongolic, and "all others."
At the time, those racial labels were real — and the source of anxiety. A medical journal article from this era expressed concern about the "preponderance of the Iberic and Slavic races" among recent immigrants, because of "their poorer physical and mental equipment" compared to "Celtic and Teutonic" immigrants.
12. How charities helped immigrants become American
The organization Hull House (founded by Jane Addams) was devoted to serving Chicago's urban poor; in the process, it set the template for charity in America. And most of Chicago's urban poor were immigrants: in 1890, in fact, immigrants made up 77 percent of the city's population. To better tailor its services to the communities it served (and to assist the federal government in its study of urban "ghettos"), Hull House researchers produced maps like this one, which shows the ethnicity of each immigrant family living in a given tenement block.
The result was that Hull House increasingly focused on teaching English, civics, and other skills that would help immigrants and first-generation Americans assimilate — what would be called the "Americanization" movement. The existence of organizations like Hull House, which were willing to take the time to help immigrants acclimate to America and learn things (like English) that they needed to succeed, was an important factor in helping the European immigrants of 100 years ago assimilate to the point they simply counted as "white" Americans.
13. Are today's immigrants less Americanized?
The "Americanization" movement of the early 1900s wasn't just about how to help immigrants. It was also grounded in the belief that immigrants should be welcomed to the United States only if they wanted to, and could, be successfully assimilated into America. That idea survives today, in everything from the metaphor of the country as a "melting pot" to the demand that immigrants "learn English." But while "learning English" is shorthand for assimilation, and despite fears that this generation of immigrants is less assimilated than their forerunners, immigrants to America in the late 20th century were much more likely to know English when they got here, or to pick it up quickly, than the immigrants who lived at Hull House. Even Latino immigrants, who lag behind other immigrants (who tend to be more educated) in how long it takes them to speak English, perform much better than the European immigrants of the 1880s.
14. The grandchildren of today’s Latino immigrants barely speak Spanish
Second-generation Latinos — the children of immigrants — tend to be fully bilingual; this might mean they're used to speaking with their parents in Spanish but using English outside the home, or just that they're in situations where they deal with Spanish- and English-speakers pretty much equally. And with the third generation, who are grandchildren of immigrants, bilingualism fades quickly. In fact, the proportion of immigrants who speak mostly English (35 percent) is bigger than the share of Latinos who are thoroughly bilingual in the third generation.
15. Immigrants are saving the Midwest
More Americans are leaving Middle America than moving there (with the exception of North Dakota). But immigrants are forestalling Middle America's demographic decline. A Chicago Council study in 2014 found four metro areas (including Davenport, Iowa, on the Illinois border, and Duluth in eastern Minnesota) that grew between 2000 and 2010 solely because of the immigrant population, and another five where immigrants made up more than 50 percent of the metro area's total growth over that time. But immigrants might be having an even bigger impact in rural areas in Middle America, where the demographic crunch is most acute. In Kansas, immigrants make up 5.3 percent of the rural population; in Nebraska, it's 4.8 percent. Just as importantly, immigrants are making these areas demographically younger. The Chicago Council report found that Wichita, Kansas, for example, lost 24 percent of its 35-to-44-year-old, native-born population from 2000 to 2010 — but its immigrant population in that age range grew by 87 percent.
16. 200 years of immigration in one gorgeous visual
It's easy now to assume that Mexico has always been among the main sources of immigration to America. But as this wonderful chart by Natalia Bronshtein (using 200 years of government data) shows, that’s not even close to true. There’s an interactive version on Bronshtein’s website: you can hover over any color, at any point, and see the exact number of immigrants who became residents from that country in that decade. But taken as a whole, the chart tells a very clear story: there are two laws that totally transformed immigration to the United States.
17. The 1920s law that made immigration much less diverse — and created illegal immigration as we know it
Because the quota laws were passed in the early 1920s, but were based on immigration flows from 1890, they actually rolled back immigration from certain countries. Politicians were worried that new immigrants from Southern and Eastern Europe (largely Italians and Jews) were genetically "inferior" immigrant stock was threatening Americans' quality of life. This pair of maps, from the New York Times, shows the effects of the primary quota law: the National Origins Act of 1924. The map to the left of the slider shows annual immigration to America from various European countries before the law was passed; the map to the right of the slider shows the quotas imposed for each country under the law. The National Origins Act forced the legal immigrant population to plummet — and made "illegal immigration" a widespread phenomenon for the first time in American history. It hasn't stopped since.