What if the reason you're losing interest in your partner isn't a lack of love, but a biological glitch caused by modern contraception? Dr. Geoffrey Miller explores how our ancestral programming is currently colliding with the 21st century, creating a profound 'mismatch' that sabotages everything from our reproductive choices to our long-term happiness. From the hidden game theory of social shaming to the ultimate threat of existential risk, we uncover why your 'stupid human brain' might be playing a different game than your heart.