In this jointly-taught seminar, we will explore the lives and work of six influential Jewish and Christian figures involved in social and environmental activism in the 20th and 21st centuries. We will delve into the autobiographies, biographies and writings of six selected figures, encountering and analyzing the social-religious contexts in which they lived, their theological and ethical commitments, and the dynamics of individual and communal transformation revealed in their lives. Further, we will analyze how the ideas and experiences of these individuals illumine contemporary social and environmental issues and point to potential responses by religious seekers and leaders, with particular attention to Jewish and Christian communities. The seminar is designed as an interreligious, cross-cultural encounter, and will encourage students to explore the values, ideas and practices of their own communities; to share in a common meal each week and other traditional practices; and to explore resonances and differences across communities and contexts, as revealed in the individuals we study and in our own lived experiences.