India, July 12 -- From skipping helmets to panic selling, we are navigating our 21st-century lives steered by a prehistoric, evolutionary, biological, hardwired remnant. We live in an era of unprecedented human intellect. We map complex genomes, build artificial intelligence, and navigate highly sophisticated global financial markets. Yet, a brilliant leader will still smoke cigarettes, and a celebrity will drink and drive. A highly educated executive will ride a motorcycle without a helmet. A seasoned investor will sell off the entire portfolio in a panic at the first sign of a market dip. On any given weekend, an ordinary citizen with a pristine reputation might destroy his family over a fleeting workplace affair. Another gets arrested ...