Since Marx’s times, a huge problem for the Left was that the proletariat (the workers and the peasants) had absolutely no use for the Left’s ideas. The most progressive classes and the deliciously downtrodden victims just didn’t want to be saved.
When the Soviet Union collapsed, the Left’s confusion was huge. It retreated but that was a strategic retreat which helped the Left to figure out the solution to its working class problem. The working class was now going to be declared the biggest enemy. This would allow to attract Big Business to the Left’s cause, and the two would happily wage a war together against the workers.