we're learning more tonight about the anti-social tendencies of the world's leading social network and we are learning it from the inside. the information comes, as you know, from a trove of internal corporate documents being dubbed the facebook papers provided to cnn and other news organizations by facebook whistle-blower, frances haugen. she testified today in british parliament and spoke plainly about company research identifying the network's central feature, its algorithm for determining what people see more of. that's also being its fatal flaw. >> i have seen lots of research that says that kind of ranking, engagement-based ranking, prioritizes polarizing, extreme, divisive content. it doesn't matter if you are on the left or on the right. it pushes you to the extremes, and it fans hate, right? anger and hate is the easiest way to grow on facebook. >> so, the algorithm ramps up extremism she is saying and facebook's own research shows it. other documents show discontent