Rabbi Marshall T. Meyer (1930-1993) forged a revolutionary Jewish theology of liberation during his twenty-five years in Latin America, creating a theological framework that bridged Jewish tradition with pressing social justice imperatives. Drawing upon Meyer's Spanish-language publications, institutional records from the Seminario Rabínico Latinoamericano, and interviews, this research reveals how he developed a distinctly Jewish parallel to Christian Liberation Theology while addressing the dual challenges of Jewish alienation and social integration. His theological vision rested on three pillars: the necessity of Jewish participation in broader society for mutual survival, the role of Jews as messengers of divine freedom, and the requirement of genuine religious community to combat modern alienation. Meyer institutionalized these principles through founding the Seminario Rabínico Latinoamericano, Bet El Synagogue, and various educational programs, while his translation work created new Spanish-language Jewish theological vocabulary that influenced an entire generation of Latin American rabbis. During Argentina's military dictatorship (1976-1983), Meyer's theology manifested in direct action, as he advocated for political prisoners and human rights. His enduring contribution represents a significant development in twentieth-century Jewish thought - a universal theology of liberation that transcended geographical boundaries while addressing the particular challenges faced by Latin American Jewry.