Geoffrey Hodgson: 200 Years of Karl Marx: "At least two major aspects of Marx’s thought removed protections of human rights and paved the way for brutal totalitarianism...
...The first was his doctrine of class struggle... a normative doctrine, about the working class seizing power and ending the rule of the capitalists. Marx and Engels argued that the current aims and desires of the proletariat were less important than its historical destiny to abolish capitalism and become the ruling class.... This is the first totalitarian impulse. Marxist revolutionaries are deemed to know better what is in the interests of the working class than the working class itself. Democracy becomes an impediment to the realization of those true interests, about which the masses are not fully aware. The normative doctrine of class struggle has another outcome. It means that the rights of one social class are privileged over another. Universal individual rights are no more. As Engels put it, legal and individual rights are “nothing more than the idealized kingdom of the bourgeoisie.”... A regime that denies rights to some, especially with malleable criteria concerning who is denied those rights, ends up denying rights to everyone. These are the consequences of Marx’s “dictatorship of the proletariat”.
A second aspect of Marx’s thought that promoted totalitarianism concerns the economy.... The concentration of all economic power in the hands of the state... requires for its enforcement, and sustains as an outcome, a massive concentration of political power that is intolerant of democracy. The good intentions or democratic inclinations of leaders are not enough. Those most hungry for power, and least affected by moral qualms in exercising it, will eventually rise to the top. There is a widespread opinion among non-Marxist social scientists (including Barrington Moore, Douglass North and Francis Fukuyama) that democracy requires countervailing political and economic power to have a chance of survival.... A complete concentration of political and economic power in the hands of the state, which Marx and Engels advocated with enthusiasm as well as eloquence, always requires and enables a despotic political regime. There are no exceptions.
Over forty years ago, Leszek Kolakowski was an Eastern European dissident and a perceptive critic of Marxism. He wrote:
My suspicion is that this was both Marx’s anticipation of perfect unity of mankind and his mythology of the historically privileged proletarian consciousness which were responsible for his theory being eventually turned into an ideology of the totalitarian movement: not because he conceived of it in such terms, but because its basic values could hardly be materialized otherwise...
Kolakowski was right. Many have still to learn the tragic lessons of Marxist failure in practice, as well as of its partial but flawed analytical success.
Critics will say that giving Marx some blame for the atrocities of the twentieth century is like trying to blame Jesus for the atrocities of the Spanish Inquisition. They are wrong, Jesus never advocated class war or a concentration of economic power in the hands of the state, both of which create the conditions for tyranny.