How did world war one to bring about the russian revolution?

The war caused inflation in the country from war costs causing many to revolt against the government, the burden of war was extremly heavy for russians which led to overthrown of tsar and later  bolshevik revolution.

Yes, some people used the depression to the max. not everybody had stocks, and those that didn't bought many things inexpensive, so that when prices rose again, they were much more richer than beforehope this