What would you do if you were worth $350 million dollars? Would it change who you are—or would you use it to change the world? In the late nineties, John Lefebvre was approaching middle age and living out an unpromising legal career in Calgary. Then he jumped on board a dot-com start-up as a founder of Neteller, an online payment company. As Neteller’s fortunes rose along with those of the online gambling industry, the pay-off for Lefebvre and his partners would be astronomical. But it didn’t...