An evolutionary model of human behavior should privilege emotions: essential, phylogenetically ancient behaviors that learning and decision making only subserve. Infants and non-mammals lack advanced cognitive powers but still survive. Decision making is only a means to emotional ends, which organize and prioritize behavior. The emotion of pride/shame, or dominance striving, bridges the social and biological sciences via internalization of cultural norms.
Weisfeld, G.E., & LaFreniere, P. (2007). Emotions, Not Just Decision-Making Processes, Are Critical to an Evolutionary Model of Human Behavior. Behavioral and Brain Sciences, 30, 43-44. Available on publisher's site at http://journals.cambridge.org/abstract_S0140525X07000866
publisher's version of the published document
Glenn E. Weisfeld and Peter J. LaFreniere. "Emotions, Not Just Decision-Making Processes, Are Critical to an Evolutionary Model of Human Behavior" Behavioral and Brain Sciences
Vol. 30 Iss. 1 (2007) p. 43 - 44
Available at: http://works.bepress.com/peter_lafreniere/2/