I am planning to write a story set in late 1978. It is about the cold war. Today we know from foresight that thanks to the Brezhnev stagnation, the USSR was doomed to fall by the 70s and it was simply a question of how and when.
My question is 'Did people in the late 1970s period know or sense this fact'?
My question is also divided into 3 parts
1)How much did common people know about the upcoming fall of the USSR
2)How much did uncommon people like government workers, politicians and spies of western countries know about the problems and upcoming fall of the USSR
3)Did people in the late 70s sense that the communism world was about about to crumble
Like what vibe did people have in the late 70s basically
Was it a known fact that America was winning the cold war atleast by a slim margin?
It says something about how thorough and total the triumph of capitalism over socialism was that people now look at economic performance alone and conclude that the Soviet Union was doomed from the beginning. Back then that was not how people thought about this - alternative state ideologies like communism and fascism did not believe in the supremacy of wealth above all other factors.
Ultimately, if alle else failed, they believed in the raw power of the jackboot. Even western analysts probably assumed that the communist party would be able to stay in power by using its state apparatus to suppress any dissent regardless of economic performance.
In that vein, I think it is kind of leaning heavily on historical determism to proclaim that the Soviet Union was already irrecoverably doomed in the 70s. Trends can be turned around. It could probably have recovered from its economic malaise under better leadership.
1) How much did common people know about the upcomig fall?
They had no clue. There was probably some feeling of discontent within the Russian population about the stagnation but we should remember that after decades of unimaginable hardship Russians still were wealthier than ever before. Not only did the Russians not know how bad they were doing compared to the West, the West also only had the vaguest of ideas. The Iron Curtain made sure of that.
2) How much did politicians know?
They knew only marginally more about the economic performance of the Soviet Union than anyone else. One contributing factor to the Soviet malaise were the perverse incentives of a centrally planned economy in a totalitarian dictatorship. The central planning bureau itself could not trust the reports and statistics it was receiving, nor was its planning in any way adequate to address the actual needs of the population.
Everyone was conditioned to try to hide problems, lest they find themselves declared part of the problem, and exaggarate success - because there was constant pressure to do so by superiors looking to earn the party's favor.
The Soviets made decisions based on partly or entirely fictitious data. Since the only way to get ahead in the system was corruption, reliability also rapidly went downhill.
Western analysts probably knew about the Soviet economy falling behind but those same analysts also liked to scaremonger about the military capabilities of the Soviet military to shake loose additional funding, so I expect there was no concise reporting going on.
3) Did people in the late 70s sense anything about the upcoming collapse?
No, not at all. It was business as usual for them. The changes that saw the Soviets fall behind were too slow and gradual to be consciously perceived by random citizens. So no, the people in general had no clue, just like we today are also not able to clearly say where we are headed.