"Crowned heads, wealth and privilege may well tremble should ever again the Black and Red unite!"
Otto Von Bismark, 1872
Pretty much what it says on the tin - prevent the Marxist-Anarchist split.
Would an earlier death of one of the primaries, Bakunin or Marx do it? Or would it require a deeper POD? I assume that it would be earlier than the Paris Commune, or maybe even a POD that butterflies it.
And what would be the result?