MacKenzie Bezos has pledged to give away at least half of her $35 billion fortune to charity as part of a movement started by Warren Buffett and Bill and Melinda Gates. MacKenzie Bezos became one of the world’s wealthiest individuals following her recent divorce from Amazon CEO, Jeff Bezos. Bezos joins Mark Zuckerberg, Richard Branson, and Robert F. Smith on the list of donors to...