If we want to wander down this road, there are two previous events upon which much of the 20th century pivoted, both within a small window of time: what if Wilson had not suffered his stroke, and had completed the realization of his vision for the LoN and led his country to join it; and if the assassin (I've always suspected contrived somehow by Stalin) had failed to deliver a fatal shot to V I Lenin, who then had taken the hint to be more careful and consequently held on to the Soviet leadership (not the ideal situation, but more likely than Kerensky managing the very recently republicanized imperial forces to successfully defend the nascent parliamentary democracy from the insurgent Bolsheviks - Lenin had grasped the initiative by declaring a Bolshevik victory would lead to immediate withdrawal from the disastrous and hugely unpopular Great War, while Kerensky dithered and worried about honouring Nicolas' treaty obligations)?
