65. George Kaiser
The Oklahoma tycoon, who backed Obama and Clinton, traveled to Iceland and Greenland this summer to see polar bears before their icy habitat is melted away by global warming. In 2016, his George Kaiser Family Foundation acquired Bob Dylan’s archives. The foundation has donated more than $4 billion to charitable causes, mostly ones focused on early-childhood education. Kaiser, whose parents fled Nazi Germany and settled in Tulsa, took over the family oil business in the 1960s. He bought Bank of Oklahoma out of receivership in 1991 for $60 million; his stake is now worth $3 billion.