John B. Cobb, Jr. (born February 9, 1925) is an American theologian, philosopher, and environmentalist.  Gary Dorrien has described Cobb as one of the two most important North American theologians of the twentieth century (the other being Rosemary Radford Ruether). Cobb is often regarded as the preeminent scholar in the field of process philosophy and process theology—the school of thought associated with the philosophy of Alfred North Whitehead. Cobb is the author of more than fifty books. In 2014, Cobb was elected to the prestigious American Academy of Arts and Sciences.