In this chapter, I discuss an important book in the history of research on marital interaction by Raush, Barry, Hertel, and Swain (1974). In this book, the idea of studying sequences of marital interaction was developed, and the notion of Adaptive Probabilism was defined. This view introduced some simple mathematics that diverged sharply from General Systems theory in its definitions of communication. The essay by Raush et al. (1974) on conflict escalation, symbolic conflict, and conflict avoidance also is reviewed and discussed in this chapter.