Increased diversity and multiculturalism. A recent influx of immigrants has been a catalyst for change as well as conflict in the United States, just as was an earlier wave of immigrants who arrived...

Increased diversity and multiculturalism. A recent influx of immigrants has been a catalyst for change as well as conflict in the United States, just as was an earlier wave of immigrants who arrived in the early twentieth century. The 2016 presidential campaign revealed a well of anxiety about immigration that several prominent Republican candidates tapped with calls for the mass deportation of undocumented immigrants and, from Donald Trump, a proposal to close U.S. borders to all Muslims, including refugees fleeing violence in Syria. In addition, the global economy and the relative ease of modern travel have begun to erode the significance of national boundaries.