Van Jones, who became one of the breakout liberal pundits of the 2016 election, stopped by Chelsea this week and gave a stirring defense of Standing Rock as a continuation of the civil rights movement. But before that, he gave the uninitiated an easy-to-understand breakdown of what's at stake and why it matters. It's a great primer for anyone who feels like they need more clarity on the Dakota Access pipeline — or some ammo to talk intelligently about the issue if it comes up over the holiday dinner table.