The answer is: The type of groups we associate with when we become adult.
Although the debate called nature vs nurture is still ongoing (roughly, our biological makeup vs socialization processes, respectively), as we grow older and proceed on our life course, undoubtedly, our experiences are molded more and more by historical circumstance rather than by determination, of any kind. Needs that have to be satisfied —from survival to employment and self-actualization— are determined by social constructs and groups in a given moment in time and history to which we have to become adapted or risk dying.
