Hadassah, women's Zionist organization of the United States founded (1912) by Henrietta Szold. It has done important work in Israel in medical service, child welfare, and aid to refugees. Hadassah provides major support for the medical school of Hebrew Univ. and most of the budget for Youth Aliyah, the organization that transports children and youths to Israel and supports them there. Hadassah's principal activities in the United States are educational and charitable work.
See study by M. Levin (1973).