Among primates, “…the top is attainable for high-ranking individuals, and they are therefore motivated to carry out aggressive strategies and intimidation so; the lower echelons, on the other hand, do not have this stimulus and react to their suppression with stable, loyal, and friendly cooperation.” Hugo den Hartog, as referenced in Chimpanzee Politics: Power and Sex among Apes, Frans de Waal

It’s hard for me not to read that and think that humans are animals, and Trump knows how to appeal to animal instincts.