An evolutionary psychologist would suggest that the function of a tradition, such as wearing green on st. patrick’s day, is to

An evolutionary psychologist would suggest that the function of tradition such as wearing green on saint Patrick day is to enhance the sense of group membership. In addition, the practice, values and goals united by sets of people is raised to as culture and associated with hunter gatherer societies, the agricultural societies are more patriarchal. As societies became larger, humans devised new cultural systems to preserve group cohesion. 

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