“…In the literature, there are numerous studies on this subject. Perhaps the best are Morgenthau (1955), Caplow (1956), Kaplan (1957), Rosecrance (1963), Zinnes (1967), Wight (1977), and Niou, Ordeshook and Rose (1989). Among these fine works, the most elegant piece is still Theodore Caplosv's (1956) theory of alignment in triads.…”