Through intimate conversations with Mordecai Kaplan's grandson, Dr. Daniel M. Musher, a more nuanced portrait emerges of the revolutionary Jewish theologian who shaped modern American Judaism. The 1981 oral history interview, conducted by Rabbi Herbert A. Yoskowitz, reveals that Kaplan's transformative influence on his family stemmed not from formal religious instruction but through lived example and personal relationships. As founder of Reconstructionist Judaism, Kaplan demonstrated his commitment to Jewish scholarship through daily writing and study practices while pioneering innovations like the bat mitzvah ceremony and expanded roles for women in religious life. The qualitative biographical interview illuminates Kaplan's distinctive educational philosophy - one that embraced intellectual diversity and conceptualized Judaism as a dynamic civilization built on shared cultural foundations rather than rigid doctrine. His humanistic theological orientation viewed salvation as this-worldly self-realization rather than supernatural intervention, while his emphasis on aesthetic elements enriched Jewish worship practices. These personal recollections provide crucial primary source material for understanding how Kaplan's revolutionary ideas were transmitted within his immediate family circle, offering new insights into his enduring influence on Conservative Judaism and broader American Jewish life.