Microsoft co-founder and billionaire, Bill Gates, has pledged to give away nearly all his wealth, giving himself a 20-year timeline to do that and close his foundation on December 31, 2045.

Gates, according to a report by global media outlet, FOX Business, 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 chairman of the Gates Foundation said.

“It makes the case that the wealthy have a responsibility to return their resources to society, a radical idea at the time that laid the groundwork for philanthropy as we know it today.”

According to the report, the 69-year-old whose Gates Foundation has given away more than $100 billion during its first 25 years, and is ready to double that over the next 20 years, said he was speeding up plans to divest his fortune.

The philanthropist, also reacting to President Donald Trump’s slashing of aid from the world’s biggest donor, the United States, said he wanted to help stop newborn babies, children and mothers dying of preventable causes.

Gates also said that he is eager to put an end to diseases like polio, malaria and measles, and reduce poverty.

“It’s unclear whether the world’s richest countries will continue to stand up for its poorest people,” he said, noting cuts from major donors, including the U.K. and France while adding that despite the foundation’s deep pockets, progress would not be possible without government support.

“People will say a lot of things about me when I die, but I am determined that ‘he died rich’ will not be one of them,” Gates said.

“There are too many urgent problems to solve for me to hold onto resources that could be used to help people.”