Argentina has been one the most important destinations for international labor migrants in the modern world. But while it was long imagined as a nation of immigrants, a closer look at its history and policies reveals that the country's doors were only open to certain people. In the late nineteenth and early twentieth centuries, officials developed a long list of grounds for exclusion that deterred many people from ever boarding a ship to the country. Travelers who did come to Argentina were frequently barred at ports of entry on account of race, health, or disability. Tracing the attempts of European, Asian, and Middle Eastern migrants to enter Argentina, Benjamin Bryce shows how the modern state worked to privilege white supremacy and expansion over diversity and magnanimity. As Argentine officials, politicians, and influential thinkers envisioned their country's future, they tried to define the ideal citizens who would live, work, vote, and reproduce in Argentina-and the characteristics of those who would not. Anyone deemed unhealthy or disabled was labeled unproductive or a potential burden on the state. Race often shaped notions of health and productivity and therefore determined who was welcome. Bryce's thorough analysis of immigration exclusions reconceptualizes Argentina's long-accepted reputation as a haven for newcomers.