People repeat behaviour that leads to flooding their brains with pleasurable chemicals. The short-term reward loop acts over hours to years, and the long-term reproductive success loop over generations.
Evolution acts slowly. Our psychological characteristics today are those that promoted reproductive success in the ancestral environmen.
Lie detection is like language there is a learning window. Telling whoppers to small children seems to be a family tradition in many families.
As for leadership, I am the kind who leads reluctantly and more by example than anything else. Someone had to be on the incorporation papers as president.
The rare person is still interested in new advances when they are adults. There is possibly a correlation with intelligence. In any case, you have to be fairly bright to keep learning and changing attitudes as you get older.
People under the influence of cults is similar to that we observe in addicts. Typical behaviour for both includes draining bank accounts, neglecting children, destroying relations with family and losing interest in anything except the drug or cult.
People can undergo a sudden change of thinking and loyalties under threat of death or intense social pressure and isolation from friends and family.