Was the Beatles' Paul McCartney right - is it getting better all the time? On GZERO World, Ian Bremmer and Harvard psychologist Stephen Pinker talk about human progress and how we define it. Sure, it's great that we're not currently being chased by saber-toothed tigers. Life is better than death. Health is preferable to sickness. Freedom? We'll take it over tyranny any day of the week. In short, we know life is better today than it was for most of our ancestors, but how do we measure that progress? And at what point does the technology that has improved our lives come back to bite us? We're looking at you, AI.