One of the most depressing books was written in 1998. It argues that we are not genetically equipped to face the abstract thinking challenges of modern life. We have to make individual choices in all areas of life (parenting, religion , mates, ethics, groups, politics). We cannot simply rely upon our parents or culture. I think there is some relevant content in this work.

In Over Our Heads: The Mental Demands of Modern Life: Kegan, Robert: 9780674445888: Amazon.com: Books

Robert Putnam’s works on “Bowling Alone” and “Our Kids” tell a similarly frightening story. We used to have a broad based commitment to community and ethical behavior, but we have lost our way, especially in the bottom half of the social structure.

Our Kids: The American Dream in Crisis: Putnam, Robert D.: 9781476769905: Amazon.com: Books

Other research indicates that general intelligence (IQ) as measured by standardized testing has increased decade by decade in statistically significant amounts. Better diet, better schooling, better media, better home life, better chemical environments. The improvements are mainly in the bottom half of the scores. We’re not seeing twice as many 800 SAT scores. This is great news for these individuals and for society. IQ measures are imperfect. Intelligence is not closely correlated with ethics. Intelligence is only one part of problem solving. There are clearly multiple intelligences and talents that are useful. All people take shortcuts and make irrational decisions. But … an increase in basic intelligence scores and reasoning abilities is something to celebrate.

Intelligence – Our World in Data

Smarter than ever? (apa.org)

Has humanity reached ‘peak intelligence’? – BBC Future

Flynn effect – Wikipedia