Great article.
Here's a quote -
"If you want your smart people to be as smart as possible, seek a diversity of ideas. Find people with different experiences, opinions, backgrounds, weights, heights, races, facial hair styles, colors, past-times, favorite items of clothing, philosophies, and beliefs.
On your own, avoid homogenous books, films, music, food, sex, media and people. Actually experience life by going to places you don’t usually go, spending time with people you don’t usually spend time with. Be in the moment and be open to it."