The United States is a nation of immigrants. Those who chose to pull up stakes and try their luck in a distant land “have energy and are willing to take risks,” says psychologist John Gartner of Johns Hopkins University. For most immigrants, that translates into a spark and drive that lead them to success in their adopted land. For a few, however, risk-taking coupled with impulsivity may set the stage for violence, Gartner says, “and you do see more violence in immigrant nations like Australia and America.” If barriers of language or culture keep an immigrant child from fitting in, it can increase the risk that he will become alienated and, given enough triggers, resort to violence. Besides murder and violence are also higher in nations with the largest income inequality. The United States ranks high on this problematic measure. Perhaps it was no coincidence that Cho, murderer of more than 30 people at Virginia Tech, railed that “your golden necklaces weren’t enough, you snobs. Your trust fund wasn’t enough.”According to Garner,immigrantsa)lack courageb)avoid taking risksc)are boldd)are feeblee)are lucky