Netflix's brilliant new 90-minute docu-drama, The Social Dilemma ... might be the most important watch of recent years. The film, which debuted at Sundance Film Festival in January, takes a premise that's unlikely to set the world alight ... ie that Facebook, Twitter, Instagram et al aren't exactly creating a utopia. Its masterstroke is in recruiting the very Silicon Valley insiders that built these platforms to explain their terrifying pitfalls - which they've realised belatedly. You don't get a much clearer statement of social media's dangers than an ex-Facebook executive's claim that: In the shortest time horizon I'm most worried about civil war." The commonly held belief that social media companies sell users' data is quickly cast aside - the data is actually used to create a sophisticated psychological profile of you. What they're selling is their ability to manipulate you, or as one interviewee puts it: "It's the gradual, slight, imperceptible change in your own behaviour and perception. It's the only thing for them to make money from: changing what you do, how you think, who you are." Despite it being public knowledge that Vote Leave and Trump's 2016 election campaign harvested voters' Facebook data on a gigantic scale, The Social Dilemma still manages to find fresh and vital tales of how these platforms destabilise modern politics. Russia's Facebook hack to influence the 2016 US election? "The Russians didn't hack Facebook. They used the tools that Facebook made for legitimate advertisers," laments one of the company's ex-investors.