Since leaders lead one at a time but followers come in bunches that make leaders, it has been possible to do a great deal of scientific research on authoritarian followers. We know how they are created, where they are concentrated, how they think, why they are so easily led, why they are so aggressive, and even a lot that they do not know about themselves.
John W. Dean and Bob Altemeyer. Authoritarian Nightmare: Trump and his followers. Melville House. (c) 2020.
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