Answer: The changes that occurred in society due to the baby boom is that the culture went from a conformity type of culture where people were aliened for being different, to a rebellious and individualist mindset. Examples of this is how baby boomers would listen to rock and roll and wear bright diverse clothing which was a complete opposite of their parents.
The quote just saying that he feel like he belong to the human race itself more strongly than any culture/nationality.
In the decline of Swedish influence and the emergence of Russia as a mojor power in that region