Maybe the french socialists would try send agents to english colonies to teach socialists idears?A interesting question is the colonies. I have no answers.
What if there is a Communism Revolution circa 1915? In France.
A no Revolution in Russia. What then?
Saving Jaures is too late a PoD, mostly because it does too little to effect the international socialist movement. To get "simultaneous general strikes in all belligerent countries" you need more than one charismatic French politician at a critical juncture: you need to redraw several decades of the history of the Socialist movement at least. If you save Jaures, you're still going to have the German, Austrian, and British parties behaving substantially the same, at least in the early months of the war.First define what exactly you mean by communism in 1915 France. Trotskysm-leninsm is definitely not on the cards. Proudhonism may be, but I'm not sure you would recognise this as communism.
A Good PoD would be to save Jaures and have him suceed in his scheme to stop the war by simultaneous general strikes in all belligerent countries. But this leads to a socialist government, not a communist one, if the difference has any meaning in this TL ( NB you still have private ownership of most means of productions and commonally owned ones are going to be workers coop, competing on a capitalistic market, not state owned )
Saving Jaures is too late a PoD, mostly because it does too little to effect the international socialist movement. To get "simultaneous general strikes in all belligerent countries" you need more than one charismatic French politician at a critical juncture: you need to redraw several decades of the history of the Socialist movement at least. If you save Jaures, you're still going to have the German, Austrian, and British parties behaving substantially the same, at least in the early months of the war.
To get a more revolutionary socialist movement in the early months of the war, you'll have to change the result of several debates in the Second International, and to strengthen the Left of pretty much every party. This would be extremely difficult, and you may have to go back to the foundation of the International and give it some machinery whereby it can make its resolutions binding on the constituent national parties (historically they were not).