https://en.wikipedia.org/wiki/Industrial_Workers_of_the_WorldAbsolutely a FF Union then and now. From being one of the major forces in fighting ungodly working conditions back then and now, in the timber fields or in Burgerville, to chasing the KKK and NeoNazis out of indigenous land and the North Dakotan courthouse (doing so with some sane Trump supporters rejecting fascists mind you) respectively. It has fought as one of the best and most effective radical trade unions in American history. Perhaps my only thing to point out is the fact that they are led by Anarcho-Communists, but that is in terms of theoretical debates and overall tactics, and does not deny the amazing work they’ve done. Freedom Union with FFs apart of it, perhaps the best militant union out there in the United States.