As I said, I'm only going from my personal biased opinion, since I wasn't alive in the 70s to experience the decade firsthand.
I admit that the '80s wasn't that great from a Doomsday point of view:
1980 7 11:53pm −2 Further deadlock in US-USSR talks, increase in nationalist wars and terrorist actions. 
1981 4 11:56pm −3 Arms race escalates, conflicts in Afghanistan, South Africa, and Poland add to world tension. 
1984 3 11:57pm −1 Further escalation of the arms race between the U.S. and the Soviet Union. 
1988 6 11:54pm +3 The U.S. and the Soviet Union sign treaty to eliminate intermediate-range nuclear forces, relations improve. 
Then gain the '70s had its issues as well:
1972 12 11:48pm +2 The United States and the Soviet Union sign the SALT I (Strategic Arms Limitation Treaty) and the Anti-Ballistic Missile Treaty. 
1974 9 11:51pm −3 India tests a nuclear device (Smiling Buddha), SALT II talks stall.