Imagine a life inside a glass box. On the one hand, you would be safe and comfortable, immune to the dangers of the outside world. But you would also be limited in your reach and potential impact. You can see, but not touch, and after a while, you will probably wonder... In 1901, Andrew Carnegie sold his steel business to J.P. Morgan for $480 million. As a fraction of GDP, that corresponds to $370 billion today! He was the wealthiest person in the world, and as such, he felt a heavy responsibility to make the world a better place. He... 
