For centuries, the Golden Rule has been hailed as the ultimate moral compass: Do unto others as you would have them do unto you.  It’s a beautiful sentiment, but it relies on a flawed presumption: Our internal maps of 'the good' are similar. In reality, we are not a monolith of rational sameness. We are a collection of diverse individuals, each navigating our own unique cone of uncertainty. As I explore in Upgrade Your Mind , our rationality is not even close to being univer