Facebook Marketplace is the world’s second-largest marketplace, in terms of monthly active users, behind only Amazon. It’s ahead of Alibaba, Walmart, eBay, Taobao, and has quietly left the once-unconquerable Craigslist in the dust. For years, I’ve been curious to learn what it took to make Facebook Marketplace work, when so many local marketplaces (including Facebook’s previous attempts) have failed. There is no better human alive to tell this story than Deb Liu, and below, for the first time, D