i recall a scientific study that found ppl who believe conspiracy theories to have significantly lower IQs. I also recall a study finding that the average IQ of US republicans to be lower than US democrats. Those two studies coupled together have interesting consistency that's manifesting right now in Washington DC, where the RWNJs have stormed the capitol.
@Wetrix https://westminsterresearch.westminster.ac.uk/item/8y84q/analytic-thinking-reduces-belief-in-conspiracy-theories https://digest.bps.org.uk/2017/04/05/why-more-highly-educated-people-are-less-into-conspiracy-theories http://edition.cnn.com/2010/HEALTH/02/26/liberals.atheists.sex.intelligence/index.html