Alex Nowrasteh at the Cato Institute has spent years researching immigration and debating the most common objections. His booklet The Most Common Arguments Against Immigration and Why They’re Wrong tackles fifteen myths with evidence-based responses. Here’s the short version.
Myth 1: “Immigrants will take American jobs, lower wages, and especially hurt the poor.”
FACT: Immigrants don’t take American jobs, lower wages, or push the poor out of the labor market.
Myth 2: “It is easy to immigrate here legally. Why don’t illegal immigrants just get in line?”
FACT: It’s very difficult to immigrate legally to the United States. Immigration law is second only to the income tax code in legal complexity.
Myth 3: “Immigrants abuse the welfare state.”
FACT: Immigrants use significantly less welfare than native-born Americans.
Myth 4: “Immigrants increase the budget deficit and government debt.”
FACT: Immigrants in the United States have about a net zero effect on government budgets–they pay about as much in taxes as they consume in benefits.
Myth 5: “Immigrants increase economic inequality.”
FACT: Maybe. The evidence is mixed. But the standard of living is much more important than the income distribution.
Myth 6: “Today’s immigrants don’t assimilate as immigrants from previous eras did.”
FACT: Immigrants to the United States–including Mexicans–are assimilating as well as or better than immigrant groups from Europe over a hundred years ago.
Myth 7: “Immigrants are a major source of crime.”
FACT: Immigrants, including illegal immigrants, are less likely to be incarcerated in prisons, convicted of crimes, or arrested than native-born Americans.
Myth 8: “Immigrants pose a unique risk today because of terrorism.”
FACT: The annual chance of being murdered in a terrorist attack committed by a foreign-born person on U.S. soil from 1975 through the end of 2017 was about 1 in 3.8 million per year.
Myth 9: “The United States has the most open immigration policy in the world.”
FACT: The annual inflow of immigrants to the United States, as a percentage of our population, is below that of most other rich countries in the OECD.
Myth 10: “Amnesty or a failure to enforce our immigration laws will destroy the Rule of Law in the United States.”
FACT: America’s current immigration laws violate every principal component of the Rule of Law. Enforcing laws that are inherently capricious and contrary to our traditions is inconsistent with a stable Rule of Law.
Myth 11: “Illegal immigration or expanding legal immigration will destroy American national sovereignty.”
FACT: Different immigration policies do not reduce the U.S. government’s ability to defend American sovereignty.
Myth 12: “Immigrants won’t vote for the Republican Party–look at what happened to California.”
FACT: Republican immigration policies pushed immigrants away, not the other way around.
Myth 13: “Immigrants bring with them bad cultures, ideas, or other factors that will undermine and destroy our economic and political institutions.”
FACT: There is no evidence that immigrants weaken or undermine American economic, political, or cultural institutions.
Myth 14: “The brain drain of smart immigrants to the United States impoverishes other countries.”
FACT: The flow of skilled workers to rich nations increases the incomes of people in the destination country, enriches the immigrants, and helps (or at least does not hurt) those left behind.
Myth 15: “Immigrants will increase crowding, harm the environment, and [insert misanthropic statement here].”
FACT: People, including immigrants, are an economic and environmental blessing and not a curse.
The pattern is consistent: most arguments against immigration assume harms that either don’t exist, are far smaller than claimed, or are outweighed by benefits. For the full evidence and citations, see Nowrasteh’s booklet:
For more recent data on the fiscal effects of immigration, see Cato’s 2026 study: Immigrants’ Recent Effects on Government Budgets, 1994–2023.