That’s the core message of Frances Haugen, the former Facebook projects manager who, in September 2021, disclosed over 20,000 pages of documents that shed light on the darkest of online places. The evidence fueled the reporting of The Wall Street Journal’s “The Facebook Files,” which found the company, whose corporate name is now Meta (FB), “knows, in acute detail, that its platforms are riddled with flaws that cause harm, often in ways only the company fully understands.”