Between 1845 and 1855, 2 million Irish men and women fled their famine-ravaged homeland, many to settle in large British and American cities that were already wrestling with a complex array of urban problems. In this innovative work of comparative urban history, Matthew Gallman looks at how two cities, Philadelphia and Liverpool, met the challenges raised by the influx of immigrants.Gallman examines how citizens and policymakers in Philadelphia and Liverpool dealt with such issues as poverty, disease, poor sanitation, crime, sectarian conflict, and juvenile delinquency. By considering