The other creators of the Giving Pledge, Microsoft founder Bill Gates and his wife Melinda use their foundation to fund initiatives and programs around the world that support agricultural development, emergency relief, urban poverty, global health, and education. They have already given away more money than anyone else on the planet, donating $27 billion, according to Wealth-X.
The Gateses are particularly devoted to fighting diseases that, with treatments like vaccinations, are easily preventable. The foundation delivers vaccinations for diseases like polio and tuberculosis to countries that don't have them.