...the Austro-Hungarian Empire wouldn't have been dismanteled and all the regions taking part to it, from Transylvania and Ruthenia, to Tirol, and from Sylesia to North-Western Italy would have become all members of a modern federal country?

Do you think communism would still have been possible?

Or perhaps such an eventuality could not have appeared, because the Empire was formed of regions and peoples completely different and impossible to settle together by democratical means?