The threat of unrestrained immigration on American society is assessed here in a sober warning about the risks of not controlling the entry of foreigners into the country that analyzes the damage to the economy and society as a whole posed by lax immigration laws.

With terrorism as a consistent threat, Americans have begun to scrutinize the effects of rising immigration and porous borders. Unguarded Gates examines America's history of immigration pressures, policy debates, and choices. In assessing the past, present, and future of immigration, Graham shows that the failure to control the influx of foreigners is leading America toward further security risks, unsustainable population growth, imported workers competition with American labor, and ultimately, social fragmentation.