I can't agree that it was Lenin who drove a wedge between socialism and communism.
Firstly it was Lenin and the Bolshevik Party in Russia that was opposed to the First World War with all its horror and barbarism.
Only a very small of other parties across Europe opposed this war.Think about it.In Britain and in Germany the young Labour Party and the huge Social Democratic Party rushed to support the most reactionary and militaristic warmongers [sounds a bit familiar]
.Lenin was astounded and didnt believe this at first because right up to the outbreak of war the socialists and democrats were opposed to the coming war but collapsed in the face of the war hysteria.
Not Lenin.The situation was so bad that at the socialist called peace conference in Zimmerfeld in Switzerland in 1916 only a couple of dozen delegates managed to turn up to attend.
Within a little over a year Lenin and Trotsky had led the Bolshevik revolution and had pulled Russia out of the war.This had a huge destabilizing effect on Germany and the allies and hastened the end of the conflict which had caused so much death and suffering.

It was Lenin that saved the honour of international socialism and we should remember that today.
When workers and artists like McColl flocked to join the communists it was because of this sort of achievement not the grotesque tyrannies of Stalin who picked up the pieces after the Revolution had been choked and exhausted.
Ifor