Dr. Joseph Chuman, leader of Bergen County’s Ethical Culture Society and professor of human rights at Columbia University, will lead a study group, “The Global Refugee Crisis: Why People Leave,” for the Bergen County section of the National Council of Jewish Women on Tuesday at the lower level conference center at the Shops at Riverside in Hackensack, 1 p.m. Light refreshments. (201) 385-4847 or www.ncjwbcs.org.