Young people can agitate against injustice better than the leader of the United Nations can, or so he says. “I as secretary-general have constraints sometimes, political constraints,” Ban Ki-moon tells his audience at Lehman College, which was the U.N.’s home for five months in 1946. “But young people, you don’t have a limit,” Ban says. “You just raise your voice. We need you rise up for civil rights, for social justice, for equal opportunity and fair play here in the United States and beyond.”