Rosa LuxemburgThe slogan "socialism or barbarism" originated with the great German revolutionary socialist leader Rosa Luxemburg, who repeatedly raised it during World War I. It was a profound concept, one that has become ever more relevant as the years have passed.
Luxemburg spent her entire adult life organising and educating the working class to fight for socialism. She was convinced that if socialism didn't triumph, capitalism would become ever more barbaric, wiping out centuries of gains in civilisation. In a major 1915 anti-war polemic, she referred to Friedrich Engels' view that society must advance to socialism or revert to barbarism and then asked, "What does a 'reversion to barbarism' mean at the present stage of European civilization?"
She gave two related answers.
In the long run, she said in The Junius Pamphlet, a continuation of capitalism would lead to the literal collapse of civilised society and the coming of a new Dark Age, similar to Europe after the fall of the Roman Empire: "The collapse of all civilisation as in ancient Rome, depopulation, desolation, degeneration — a great cemetery."
By saying this, Luxemburg was reminding the revolutionary left that socialism is not inevitable, that if the socialist movement failed, capitalism might destroy modern civilisation, leaving behind a much poorer and much harsher world.
In 1848, in The Communist Manifesto, Karl Marx and Friedrich Engels wrote: "The history of all hitherto existing society is the history of class struggles ... that each time ended, either in the revolutionary reconstitution of society at large, or in the common ruin of the contending classes."
In Luxemburg's words: "Humanity is facing the alternative: Dissolution and downfall in capitalist anarchy, or regeneration through the social revolution."
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http://www.greenleft.org.au/node/40018