<<Between Monroe and Stalin which doctrine is better needed?>>
I dunno, between Al Capone and Vito Genovese, who needed guns and bullets more?
Actually, I can give a much better answer: the Stalin doctrine, obviously. The U.S.S.R. was invaded from the West twice in the past 90 years, once during the Russian Civil War, by troops from Britain, the U.S., France, Poland, the Czech Legion and Canada (and probably others) and once during WWII by troops from Germany, Romania, Hungary, Spain, Argentina, Croatia, Slovakia and probably a few others I left out. How many times was the U.S. invaded in the last 90 years and by how many countries?