With an estimated net worth of more than $55 billion, author and philanthropist MacKenzie Scott is one of the wealthiest women in the world and owns 4% of Amazon. In 2019, Scott signed the Giving Pledge, a campaign that encourages the world’s most affluent people to give a majority of their wealth to charity to serve others. Scott’s husband, Dan Jewett, has also signed the pledge. Over the last year, Scott has given billions to mission-driven organizations—including higher education institutions—with the goal of uplifting historically underrepresented populations. As part of her divorce settlement with Jeff Bezos, MacKenzie Bezos received a quarter of Jeff’s stake in Amazon—which made her not only the third richest woman in America but also the fourth richest woman on the planet. Bezos has signed the Giving Pledge, promising to donate more than half of her wealth to charitable causes. That could move her down the ranks. (Her ex has not signed the pledge.) A novelist, she has worked as a dishwasher, a waitress, a deli cashier, alibrary monitor and a research assistant to the late novelist Toni Morrison. MacKenzie Bezos was one of Amazon's first employees. The couple met at D.E. Shaw, a bank, before Jeff Bezos founded Amazon. They have four kids. Amazon CEO and founder Jeff Bezos said that he will divorce his wife of 25 years, MacKenzie Bezos, in a tweet on Wednesday January 9 2019. MacKenzie Bezos is a novelist, and has written books including "The Testing of Luther Albright" and "Traps." In July 2020, she identified "116 Organizations Driving Change" which she will support through her philanthropy.