Melinda French Gates on what billionaires with 'absurd' wealth owe back to society

"It takes philanthropy in concert with civil society and government — massive government funding — to change things ... " says Melinda French Gates. "Philanthropy cannot do it on its own."

In a new memoir, French Gates writes about the end of her marriage to Microsoft co-founder Bill Gates, and her ongoing philanthropic work, directing funds and attention to women's health initiatives.

(Image credit: Jason Bell)