John Derbyshire has a very good article on 1979, concluding thusly:
The miserable shuffling retreat had been stopped. Western civilization had turned to face its enemies, both those inside the walls and those without. The war that then commenced is not yet over. Perhaps it never will be; but it was in 1979 that we got our nerve back, picked up our discarded weapons again, and resolved to fight. This was the year it all changed, the year the ice cracked.