MacKenzie Bezos’ recent announcement that she’d take the Giving Pledge and dedicate at least half of her $35 billion in net worth to philanthropy has sparked attention, partially because her ex-husband, Jeff Bezos, wouldn’t sign the pledge. Her commitment to the Giving Pledge, spearheaded by Bill and Melinda Gates and Warren Buffett in 2010, should be lauded, especially in light of the current cynicism about the giving of mega philanthropists.

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