Cultural psychology requires a theoretical perspective and a rigorous methodology. Focusing on the sampling method, sampling the specimens together with their contextual and historical surroundings is needed. Socio-cultural-historical phenomena in cultural psychology are studied with a different type of universality in focus that is available to researchers through analytic generalization. The basic notion of psychological science needs to be built upon idiographic assumptions. The chapter introduces three studies using the trajectory equifinality model (TEM) model that is the basis for the historically structured sampling (HSS) method of sampling. In the case of each of the three: on adolescents' abortion experience, girls' decisions to start making cosmetics, and infertile wives to abandon to continue receiving reproductive treatments. The chapter outlines the structures of personal life decision histories through an analysis of various bifurcation points.