Wolfson, Puri, and Martinelli write in the Journal of Conflict Resolution in 1992:
We propose a dynamic model of the interaction between two rival powers. It is not an easy model, because it involves nonlinear difference equations; yet it is simple in the sense that it involves only a few variables. Parsimony shows that complexity and apparent paradox need not arise from the multiplicity of factors but from their nonlinear connections. Complications certainly may be introduced such as considering more than two states and alliances among them (Wolfson 1973) as well as further specification of expectation formation. They might improve some future statistical investigations, but the theory has no need for those hypotheses to explain the complexity of the historical record. Occam’s razor suggests that small is beautiful.