I turned 67 in October. It’s hard to believe I’m that old—in America, most people my age are retired! But I won’t be slowing down anytime soon. I’m still going full speed on the project I began more than two decades ago, which is to give the vast majority of my resources back to society.

Although I don’t care where I rank on the list of the world’s richest people, I do know that as I succeed in giving, I will drop down and eventually off the list altogether. I’ve always viewed my philanthropy as a way to help reduce the awful inequities I see around the world. I also feel a responsibility to give my wealth back to society in ways that do the most good for the most people. But I started looking at the world through a new lens recently—when my older daughter gave me the incredible news that I’ll become a grandfather next year.