From my own experience over 60 years, many different organizations, and over 20 different countries I’ve come to believe that intelligence is a necessary but not sufficient condition for psychological flexibility. This is because ambiguity requires more cognitive effort than simple black/white up/down polarities. It’s not surprising therefore that those most drawn to authoritarian ideologies are also those who tend to fall on the left-hand side of the Gaussian distribution of intelligence. That said, the various factors involved in personality also play a large role and thus even nominally highly intelligent people do sometimes gravitate towards authoritarian positions, only less frequently than those who are more cognitively constrained.