Like, how, though? Money isn't just a magic wand that makes things happen, you have to spend it on stuff. Solving world hunger is a complex technological, political, logistics problem. Where do you make the food? How do you store it? How do you get it to hungry people? How can you make that a persisting, resilient system so you're not back to square one in a few years?

He's a long term investor. He's not an agricultural scientist, or logistics expert. What more do you want him to do, personally? He's already donated something like $60B to organizations that do fight to address world hunger, and poverty, and health.

Don't get me wrong, I agree billionaires shouldn't exist, but that's a failure of the system itself. He's just playing the game he was born into. He's donated a huge portion of his wealth to these causes already, and promised to donate basically the entirety of the rest when he dies. Like what else do you want him to do about world hunger?