The ex-wife of Amazon CEO Jeff Bezos was one of 19 people to sign the Giving Pledge, an initiative founded by Warren Buffet and Bill Gates, where wealthy people promise to give away a majority of their money within their lifetimes, or in their wills. WhatsApp co-founder Brian Acton, Pinterest co-founder Paul Sciarra and Coinbase CEO Brian Armstrong also signed the pledge. (CNN)

Talking point: MacKenzie’s willingness to give to charity far outstrips Jeff’s. He promised to give away US$2 billion in September 2018, which was about 1.3 per cent of his net worth at the time. That pledge followed years of public pressure, including calls for him to sign the Giving Pledge—he was the only one of the top five billionaires in the U.S. at the time not to have done so. Mackenzie’s letter was short on details about how she’d donate the money, though she’s spent a fair bit of time on anti-bullying efforts since the divorce. Other targets could be homelessness and education, which the two said would be focuses of their philanthropy when they divorced.