This about sums it up in my mind. Based on science, Darwinism and survival of the fittest or adaptable guarding against predators that eat your resources then eat you.
Good leaders
Bad leaders

387012 05: A pile of dead sheep lies in a field March 21, 2001 on the outskirts of the village of Unthank in northwest England. These animals, healthy and free of foot and mouth disease, were culled in a pre-emptive strike against the disease spreading further. Over 400 cases have been confirmed in the United Kingdom so far. (Photo by Graham Barclay/BWP Media/Newsmakers