David Ray Griffin was an American professor of philosophy of religion and theology and a 9/11 conspiracy theorist. Along with John B. Cobb, Jr., he founded the Center for Process Studies in 1973, a research center of Claremont School of Theology that promotes process thought. Griffin published numerous books about the September 11 attacks, claiming that elements of the Bush administration were involved. An advocate of the controlled demolition conspiracy theory, he was a founder member of Scholars for 9/11 Truth.

The Center for Process Studies was founded in 1973 by John B. Cobb and David Ray Griffin to encourage exploration of the relevance of process thought to many fields of reflection and action. As a faculty center of Claremont School of Theology in association with Claremont Graduate University, and through seminars, conferences, publications and the library, CPS seeks to promote new ways of thinking based on the work of philosophers Alfred North Whitehead, and Charles Hartshorne, and others in the process tradition.