At first I enjoyed the irony in this comment -- thinking the lead-poisoning myth is my type of conspiracy -- but it turns out, in a spectacularly non-conspiratorial way, researchers have shown correlation between lead exposure as a child and maladaptive personalities as an adult.

Brain damage in general is my hypothesis. Repeated head trauma, toxic substances like drug abuse and heavy metals in general. Anything that damages brain tissue eventually disrupts the ability for rational thought in the mild end to disconnection with reality altogether in the most extreme cases of psychosis.

this has been my theory. Gun ranges, especially indoor ones are linked with extreme levels of lead vapor. Throw in a bit of narcissism and a lack of education and you have a recipe for a mental gymnast. Although I think QAA podcast has noted that like extreme surgery recovery drug cocktails/routine breaking seem to also be turning points in many people's journeys where they start to seek out conspiracies