Why are the Left returning to Communism?
For most of the 20th century, the Left were angry about disparities in income and power and they thought that government control of just about everything would fix that. Stories about poverty and oppression in the Soviet Union were dismissed as "Lies of the capitalist press". I remember being told that personally by an Australian Communist in the '60s.
Self deception is powerful but it was not powerful enough to withstand the "perestroika" and "glasnost" of Mikhail Sergeyevich Gorbachev. When the General Secretary of the Communist Party of the Soviet Union said that Sovetskaya Rossiya had big problems, even the most diehard Leftist had to sit up and take notice. And the complete implosion and breakup of the Soviet Union under Boris Nikolayevich Yeltsin threw the whole of Leftist ideology into a cocked hat. Their great examplar of an alternative system to capitalism was gone as if in a puff of wind.
So we all know what happened after that. Talk about money and power took a back seat among the Left. Instead political correctness reigned supreme -- and still does mostly. It was no longer the poor to whom the Left offered their dubious sympathies but rather every downtrodden or disadvantaged group under the sun. They no longer had a grand narrative but they could nag. There have already emerged from the Left some intimations of support for pedophilia so that will undoubtedly blossom in due course. Anything to upset the status quo
Memories are short, however, and the Soviet disappointment no longer is in the mind of many Leftists -- not only young Leftists but also in the aged minds of people like Jeremy Corbyn and Bernie Sanders, who should know better. They probably do know better but count of the ignorance of the masses who never knew much about communism and who have now forgotten what little they knew.
Communism is an extreme expression of envy and envy has always been a strong force politically so it is a very promising road to power among unscrupulous and ambitious frauds. It gave the Left half the world for a time.
So in America we now have a resurgence of the old fraudulent ideas of the 20th century Left. What Bernie Sanders and Occasio Cortez preach is as if communism never happened. The old reality-defying ideas about using vast government legislation to correct imbalances of power and wealth have roared back. America managed to withstand such ideas in the 20th century so we can have good hopes that this new outburst of authoritarianism will not succeed -- but we cannot be complacent.
There is a big article in The Economist that gives a comprehensive but rather skeptical outline of current Leftist thinking.