For Marx and Engels, communism was the most advanced form of socialism. They saw the evolution of advanced societies as starting with capitalism, moving to socialism and finally reaching the ultimate goal of communism. Under proletariat rule, the communists would abolish private ownership of land, farms and factories, and hand all control over to the state. Housing, medical care and education would all be free, and every worker would have a job.
In a way, Marx and Engel's vision of a truly communist society was also utopian. They believed that at some point the state itself would cease to exist, and the workers would simply share everything. As Marx famously wrote: "From each according to his ability, to each according to his needs."
"In that higher stage of communism, there would be general equality and general abundance," says Markowitz. "People could do whatever they want without harming others. They would be genuinely free."
But Marx and Engel's version of revolutionary socialism, also known as Marxism, was never really put into practice. Instead, the world's first communist revolution happened in an unlikely place, Tsarist Russia, and its political mastermind was Vladimir Lenin.
Vladimir Lenin delivers a speech from a car in Red Square to the general military training troops, 1919.
K. A. KUZNETSOV./UNIVERSAL HISTORY ARCHIVE/UNIVERSAL IMAGES GROUP VIA GETTY IMAGES
Lenin was a Marxist, but he put his own twist on communist theory. Lenin was a champion of the workers, but he wasn't confident that a "dictatorship of the proletariat" would spontaneously form after the revolution. In place of a "dictatorship" elected or appointed by the workers, Lenin preferred a dictatorship of the Communist Party.
Under Leninism, all power was put in the hands of a political elite that controlled all aspects of Soviet economic, cultural and intellectual life with the goal of creating a more equitable socialist society. In reality, Leninism slipped into authoritarianism and totalitarianism with violent crackdowns on dissent or opposition.