That sort of rioting and destruction (namely, the election of Donald Trump)
did happen again because we
took a "tough shit" attitude to people who
lost their jobs en masse to competition from free trade.
Unfortunately, I don't think the lesson was learned, because people mostly just demonize the displaced workers by calling them racists, bigots, and nazis so that they don't have to confront the fact that the magnifying lens of creative destruction might fry them next -- and their families and friends and children and town and any adjacent industry they might attempt to flee to.
On one hand, that's such a terrifying prospect that it's hard to blame people for wanting to avoid the thought of it, but on the other, we really, really need to find a way to address this, because it's a recurring theme that at best won't go away and at worst... well, I don't want to think about that either.