At the base of the mountain, Tom Steyer was a billionaire hedge-fund manager with oil and gas investments and a seemingly conflicted conscience. But by the time he and environmentalist Bill McKibben finished a hike up two tall Adirondacks peaks on that summer day in 2012, Steyer had revealed that he was ready to change his life — he would unload his investments in fossil fuels and become an activist in the fight against global warming.
Steyer’s move into big-money politics would not be possible had he not reaped a fortune in part through fossil-fuel investments.