Roger S. Gottlieb (born October 20, 1946) is professor of philosophy and Paris Fletcher Distinguished Professor in the Humanities at Worcester Polytechnic Institute. He has written or edited 21 books, including two winners, and over 150 papers on philosophy, political theory, (environmental) ethics, religious studies, (religious) environmentalism, religious life, contemporary spirituality, the Holocaust, and disability. He is internationally known for his work as a leading analyst and exponent of religious environmentalism, for his passionate and moving account of spirituality in an age of environmental crisis, and for his innovative and humane description of the role of religion in a democratic society.