answer:I kind of think that it may be an evolutionary hold over that has been mated with centuries of the development of social norms and customs. In the early days of human kind, we had to make judgments on our fellow tribe members as to whether they were friend or foe, or if they would continue to benefit the tribe or not. As humanity continued to evolve and cultural norms and customs began to be ingrained, we replaced our judgments of people’s survival effectiveness with judgments of how well they fit into our notions of “good society.” Make sense?