KEY TAKEAWAY: There are 540 billionaires in the United States, with a combined net worth of $2.399 trillion, according to our 2016 list of the world’s richest people. That’s more billionaires and more combined net worth than any other nation in the world.  What if half of them decided to donate $10 million to a program to bring free healthcare to those who can’t afford it in the US? Continue reading →