Revolution is not going to spring fully formed from the efforts of some tiny, irrelevant Trot party. The DSA also can't achieve revolutionary goals, but is useful as a means of leftist organization and theory education/class consciousness raising. They're basically like the Russian narodniks, reformists who slowly become radicalized after years of being rebuffed and eventually spawning the Bolsheviks.
DSA could be critical in achieving revolution in the USA, but ONLY if they focus on local organization and dual power structures and ignore their leadership's inane ideas about electoral politics and deposing the Dems.
