In their philosophical works Alfred North Whitehead and John Dewey criticize philosophical conceptions that consider the stability of the outer world to be a basic characteristic of reality and conceive of change only as its secondary feature. Both Dewey and Whitehead emphasize that different kinds of process underlie the existence of seemingly stable and unchanging objects. Consequently, both men are considered to be process philosophers. Their philosophical systems harmonize in many respects. It is surprising, then, that in their philosophical writings they rarely mention each other. This article has three main aims. Its first part is a discussion of how and where the two philosophers do in fact refer to each other, and it seeks to show h...