I think the fear is not of a lynch mob - we evolved in situations where we relied on the group for survival, and ostracism meant a much higher risk of death, wh

I think the fear is not of a lynch mob - we evolved in situations where we relied on the group for survival, and ostracism meant a much higher risk of death, whether from predation or starvation. Alternatively, any violence, even between individuals, had a higher risk of death due to bacterial infection etc.