How might socialism lead to World War I?

The British Socialist Party (successor to the SDF) war manifesto declared that it recognised: “… that the national freedom and independence of this country are threatened by Prussian militarism and that the Party naturally desires to see the prosecution of the war to a speedy and successful issue.”

Explanation: Socialism and communism played only a relatively small role in World War I. They were not a part of the cause of the war.

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