Assume that ww1 goes slightly differently and for some reason either Tsarism never ends in Russia or the whites win the civil war. The end result is that Russia does not go communist and does not become a pariah state. in the short run, it remains a member of the Entente. But what about the long run?
I believe there is a possibility that a surviving triple Entente would suffer from internal tensions that would cause it to split.
For once, the bogeyman of Imperial Germany is (for the moment) gone. The entente members have less incentive to cooperate. Old rivalries could reignite. For example between Britain and Russia. Britain could perceive Russia as the new greatest threat to the balance of power, and relationships between the two could cool down. Britain and France also had their own colonial rivalries prior to the war. And interwar France had lots of expansionist plans in and out of Europe. A major objective for France was to annex the Rhineland. In OTL they were stopped by Britain and other countries who did not want to see Germany dismantled. And the French had to swallow their pride because they needed a continued alliance with Britain to deal with the threat of a resurgent Germany and that of a resurgent Soviet Russia. But here the French might turn to the (non-communist) Russians for help and might get that help. the aliance between Franc and Russia would stay strong, while the British could drift away from their former allies, probably renewing their alliance with Japan and with any other powers interested in containing Russia.
Could this be the basis for two new competing alliances?