Hadassah Marcus was an American philanthropist renowned for her dedication to supporting Jewish causes in Israel. Born in the early 20th century, she co-founded the Central Fund of Israel in 1975 alongside her husband, Arthur Marcus, establishing it as a key conduit for charitable donations from the United States to Israeli organizations and initiatives. Under her leadership in the organization's formative years, Hadassah emphasized a model of volunteer-driven operations, ensuring that 100% of donations were passed through directly to recipients without administrative deductions, which helped build trust and expand the fund's impact on education, healthcare, and community development projects in Israel. She actively managed the organization's early operations until her death in 2012, reflecting a deep commitment to Zionism and Jewish continuity. Her work leveraged her organizational skills to foster partnerships with donors and Israeli nonprofits, often drawing from her personal experiences as a Jewish American. She navigated the challenges of fundraising during periods of geopolitical tension, maintaining the fund's non-political stance while supporting a wide array of humanitarian efforts. Her influence extended beyond formal roles, inspiring a network of volunteers and philanthropists dedicated to Israel's welfare. Her partnership with Arthur Marcus exemplified a shared vision that bridged American Jewish communities with Israeli needs, solidifying her role as a pivotal figure in transnational philanthropy. Her efforts were recognized within Jewish philanthropic circles for promoting transparency and efficiency in charity, though the organization has faced scrutiny over the years regarding the destinations of some funds.