Microsoft co-founder Bill Gates has given himself a 20-year deadline to "give away almost all of his wealth."
The Gates Foundation says it has donated more than $100 billion over the first 25 years and will double that amount over the next 20 years.
Gates said he made the decision after reading "a lot of books."
"One of the best things I read was an 1889 essay by Andrew Carnegie called 'The Gospel of Wealth,'" the Gates Foundation chairman wrote. "It argues that the wealthy have a responsibility to give back to society, a radical idea at the time that laid the foundation for philanthropy as we know it today," he added.
"People will say many things about me when I die, but I am determined that 'he died rich' will not be one of them," wrote Gates, who turns 70 later this year. "There are too many pressing problems to solve for me to keep resources that could be used to help people."
The Gates Foundation, one of the world's largest charities, has already given away more than $100 billion since its founding, including developing new vaccines, diagnostics and treatment delivery mechanisms to fight diseases around the world. Gates has increased the pace of his giving in recent years, especially in the wake of the pandemic, but Thursday's announcement marks a dramatic acceleration in the mobilization of his wealth. The Gates Foundation called it "the largest philanthropic commitment in modern history."