I always thought that the Bolshevik Revolution was a product of some 20 million Russian war dead ,together with intolerable conditions on the home front and corruption and decay of the old order.

The February Revolution meant that tens of thousands of Russian soldiers streamed away from the front and the end of th war cabinet.

The Bolshevik led October Revolution a few months later was to turn the world upside down if only for a few years with the Bolsheviks ending Russian participation in the slaughterhouse that was WW1 and the declaration of a workers republic.
walt