Well, a good Clintonian defence here would be that it depends on what your definition of "alliance" is. Usually the people who insist that Stalin and Hitler formed an Official Evil Alliance of Evil Stuff (TM) with the pact are the same people who insist that Finland was just a "co-belligerent" of Hitler's later on, so these definition games start getting less interesting every time they occur.
As noted above, interwar diplomacy was pretty complicated, and there were loads of different treaties between countries (although they generally didn't have the kind of secret protocols that the M-R Pact had). Some of them were, of course, little more than scraps of paper in practice. France and the USSR had a treaty in 1935, but it never amounted to much. France also supported the "Little Entente" between Czechoslovakia, Romania and Yugoslavia as a deterrent against Germany, Austria and/or Hungary, but that was also made irrelevant eventually.
There was also the Stresa Front of Italy, France and Britain in 1935, which was aimed at guaranteeing the independence of Austria. That broke down due to the Anglo-German Naval Agreement and the Italian invasion of Abyssinia. The Italians started moving towards Germany more after that, and neither the British nor the French were really interested in going to war over Austria, especially once it turned out that most Austrians wanted the Anschluss to happen. After that, of course, we have the famous Munich Agreement, and later the coup in all of Czechoslovakia, etc., which everyone knows about anyway.
What I often notice is that there is a lot of history on Munich, on Appeasement, etc., and the historical debate around it seems quite lively. A search on Wikipedia shows this debate in all its facets:
http://en.wikipedia.org/wiki/Neville_Ch ... ean_Policy Is there anything like that on the M-R Pact? I mean, I've read (and often quoted here) some very informative works by communist authors, but anything more general? Or does everyone just accept that it was some natural alliance between "twin dictators" that was bound to fail eventually?
One thing that bugs me about the Pact is that it was made at the time when the Allies had already given their guarantee for Poland, and they made it clear in no uncertain terms that any attack on Poland meant war. Without the "green light" represented by the Pact, would the Germans have taken the risk?