European block starts neutral?
Assuming De Gaulle and Churchill meet unfortunate ends just after the war, it might be possible. EuroBlock takes a socialist leaning (not implausible - the Labour victory in 45 is a start), decides rebuilding is more important than sabre rattling.
EuroBlock sets a course of appeasement with certain problem areas at first, such as relations with India, some colonies, largely to keep them at least friendly, whilst courting other European nations. BeNeLux would be an easy win, possibly Italy. A neutral stance might appeal to Scandinavia, maybe even the Swiss. The US goes more isolationist, seeing themselves sidelined by Europe's neutrality.
Later on, once more established, perhaps the 60's, the right wing makes a return, takes a more hardline position and re-arms to stand as a more interventionist capitalist state (opposing the US increased isolationism), and finally taking a stand against communist oppression in the east.
It's probably not quite ASB, but would require tweaks to both European and US politics in the immediate post-war era.