If you saw even a single Bernie Sanders speech during his insurgent 2016 presidential bid, or during his 30 years in public office prior, you know he’s worried about rising economic inequality.

The big question he wants to know is, why aren’t you just as worried?

The Vermont senator recently assembled a panel of some of the brightest luminaries from government, entertainment and academia to take on this issue. They brought forward serious, sober and concrete ideas on what’s causing our growing economic divide and what we can do about it. More than 1.7 million viewers tuned in for the event, streamed on Facebook Live, with tens of thousands more watching it later.

“Three men have more wealth than the bottom half of the country combined,” Sanders said in his opening monologue, citing the Billionaire Bonanza 2017 report I co-authored for the Institute for Policy Studies. It was one of a cavalcade of statistics from Sanders and the other speakers showcasing extreme concentration of wealth at the top and rising poverty at the bottom.