I also sometimes feel that the 1950's and the 60's were a golden era compared to later decades. But that could be because I was just too young to realize the problems around. Our younger days are always golden.
However it is possibly a fact that after the WWII .... and in India the war of Independence, there was a sense of relief and a settling down to a good life with a sense of loyalty, morality, building families, looking ahead, wanting to build the nation and so on. This probably did lead to a period of calm, enthusiasm, hope and optimism. I particularly enjoyed the movies of this period and most Indians still look back to this period as a golden period.
Then, by the end of the 60's came the wave of 'new ideas, new fashions, new thinking, globalization' etc....which rattled the calm somewhat. This has since grown and change has been very fast. In the last 40 years the world has become unrecognizable in many ways while retaining the same human issues as before. Too much of change too fast and too much of mental adjustment is disconcerting.
This is probably why the world looks troubled. Its our minds that are not adjusting to new situations and new values. In reality the world is probably better off now than ever before.