Read and learn from successful revolutions, and the Marxist tradition in general, which correctly identifies both the root problem, and has a wealth of historical experiences for how to defeat it, the correct and incorrect roads taken, and what worked/didn’t. Join working-class parties, and organize for our own interests, so that sociopaths who would be happy sacrificing all of us for the sake of profits, don’t control society.
@Cowbee@lemmy.ml keeps an excellent study guide here, and I have one here.
With Vietnam I think the US protest movement played a significant role in the defeat(the docu Sir no Sir! has a good overview of it), less so with recent US wars. But that’s also due to the size and growth of the US police state, it’s imprisoning of activists, and it’s better ability to minimize the efficacy of protests.
But ya I agree with the US rightward turn since the 1980s, it’s union and anti-war movements have been on life support. The historian J Sakai thinks that US unionism fully died by then (especially if you look at stats like strikes per year, which dropped to single digits).