The metaphysics of Alfred North Whitehead undoubtedly represents one of the most innovative systematic designs in 20th-century philosophy. Dennis Sölch demonstrates that Whitehead's process metaphysics is part of a tradition alongside the process philosophical ideas of Henri Bergson and William James. He reconstructs their respective systems and highlights their common premises, argumentative interfaces, and substantive differences. The book thus provides new impulses for historical-systematic research as well as an entry point for a deeper engagement with Whitehead's philosophy.