For decades, immigration has been one of the most divisive, contentious topics in American politics. And for decades, urgent calls for its policy reform have gone mostly unanswered. As the discord surrounding the modern immigration debate has intensified, border enforcement has tightened. Crossing harsher, less porous borders makes unauthorized entry to the United States a permanent, costly undertaking. And the challenges don’t end on the other side.

At once enlightening and devastating, The Border Within examines the costs and ends of America’s interior enforcement—the policies and agencies, including ICE, aimed at removing immigrants already living in the country. Economist Tara Watson and journalist Kalee Thompson pair rigorous analysis with deeply personal stories from immigrants and their families to assess immigration’s effects on every aspect of American life, from the labor force to social welfare programs to tax revenue. What emerges is a critical, utterly complete examination of what non-native Americans bring to the country, including immigration’s tendency to elevate the wages and skills of those who are native-born.