Many of you may be familiar with this post at the BHP forums. It somewhat boiled down to a discussion on the rather incomplete political and economic climate that would have enabled Red Alert to take place (I mean, sure, we know the basics: Hitler dies before coming to power thanks to Einstein, the arms race happens considerably sooner, war breaks out between the Allies and Soviets). But really, that doesn't explain all of it. It leaves out important notes on the political climate of China and the Orient, Africa, South America, and other such factors. It fails to explain how Poland is a Communist country by the beginning of the GWWII.
I happen to be a bit of a history nut. I don't like discrepancies like this, so I did my best to answer some of the questions raised in the linked thread. Here's what Cat5 asked and what I wrote (respectively):
Here's my answer:
Also keep in mind that my explanation is just one of many plausible possibilities based on what I know of history and the political climate that surrounded the times.