In this engaging discussion, Eric Turkheimer, a Professor of Psychology at the University of Virginia and author of 'Understanding the Nature-Nurture Debate,' dives into the complicated world of IQ. He explores its stability and the significant rise in scores over the past century. Turkheimer challenges essentialist views of intelligence, emphasizing its interplay with genetics and environment. The conversation also touches on the implications of misusing IQ measures and the evolving perspectives on intelligence as both a fixed trait and a malleable quality influenced by various factors.