I recall the Cuban Missile Crisis. My mom and dad took us kids along with them to look at buying some underground shelter. [Even though we lived on the West Coast.] And all through the 60's, 70'sand 80's the power and ability of the USSR was never in doubt. No one thought starting a war with the USSR was a good idea. Everyone thought peace and cooperation with Russia was the most important thing.
Why is it that now people think that they can keep on poking the bear without worry? One reason is the fact that Russian advance into Ukraine has been slow. But that does not signal weakness but rather the desire to reincorporate the Ukraine back into the orbit of Russia. There is no desire to ruin things, but to keep everything intact, but just have rule from Moscow.
And for years I asked people what they thought about how things were in the Ukraine as different from the time of the USSR. This I asked from the women at the markets, from the owners of stores. From random people where ever I went in the Ukraine. And the answer was always the same. "Things were better then than now." [I.e. better under the USSR than the more recent governments.]]