Gates is doing everything he can to start a Civil War and a World War to depopulate the planet so his prediction is really a promise.
Which is truly unfortunate, as he could be one of the greatest humans in history is he spent all his money doing two things:
1. Develop clean water supplies worldwide.
2. Establish education structures to allow/encourage the simple ability to read for all people, worldwide.
Those two things alone would go further to ‘saving the world’ than any of the garbage that’s promoted now.