One factor was that the debate which took place on the third wave of immigration. This was because people believed that with the increase of immigration follows an increase in urban crime and social problems. Nevertheless, an extensive amount of studies conclude that native-born Americans are more likely to perpetrate crimes and the probability of an immigrant committing a crime is less likely. Gerber asserts that “Other studies have revealed that urban crime actually declines with an influx of immigrants, including the relatively poor.” Additionally, Gerber contributes a broad amount of evidence that concludes immigration is vital to the prosperity of the United States.