MacKenzie Bezos,worthmore than $36 billion afterdivorcingAmazon (AMZN) CEO Jeff Bezos, announced on Tuesday that she will give at least half of her fortune to charity.

Bezoss promise came by signing the Giving Pledge, an initiative founded in 2010 by Bill and Melinda Gates and Warren Buffett that encourages the worlds wealthiest people to donate more than half of their wealth to charitable causes.

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There are lots of resources each of us can pull from our safes to share with others, the fictionauthorstated in a letterpublishedon the Giving Pledge website.

In addition to whatever assets life has nurtured in me, I have a disproportionate amount of money to share, MacKenzie Bezos added. My approach to philanthropy will continue to be thoughtful. It will take time and effort and care. But I wont wait. And I will keep at it until the safe is empty.

Bezos previously funded cancer research, and founded the anti-bullying organizationBystander Revolution. She is one of 19 signatories of the Giving Pledge announced on Tuesday.

The generosity of this group is a reflection of the inspiration we take from the many millions of people who work quietly and effectively to create a better world for others, often at great personal sacrifice, Warren Buffettsaidin a statement.

Jeff and MacKenzie Bezosannouncedtheir divorce in January, after 25 years of marriage. One month later, Bezos alleged that the National Enquirer tried to blackmail him using intimate photos of him with his mistress, Lauren Sanchez, who was revealed to have been having an affair with the Amazon CEO.

On April 4, MacKenzie Bezosannouncedthat she would give him 75% of her Amazon stock as part of their divorce agreement.

Jeff Bezoss wife gives him 75% of their Amazon stock and voting power in divorce

Amazon history: How Jeff Bezos started with 20 mail order products and then dominated e-commerce

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