I'm 50 and I'm far smarter than I was in my 20s. I find that's true of most people who keep their mind sharp and don't let life beat them down. edit: A lot of

I'm 50 and I'm far smarter than I was in my 20s. I find that's true of most people who keep their mind sharp and don't let life beat them down. edit: A lot of people are beaten down by the time they're in their 40s. They feel like failure and they've lost hope, or they're stuck in a game of Prisoner's Dilemma. Those people aren't as smart as they were back when they were making the mistakes that led to their sorry state.