I prefer not to answer my own questions but, like everybody else, I'm reminded of so many unpleasant historical events that happened since I was born in 1937. But it wasn't all bad and I wanted to list some of the others. (I won't mention any that have already been listed.)
The old British Empire was replaced by a commonwealth of self-governing "dominions". More freedom for all with less dependence on mother England.
The establishment of Israel created a homeland for the Jews. Controversial? Of course, but a rare historical landmark.
The further development of telecommunications, and eventually the Internet, gave all of us much more knowledge about what was happening.
Giant leaps forward in civil rights including the overthrow of South Africa's apartheid regime.
Glasnost ... Which may have been a very mixed blessing.
The rise of the European Union.
Extraordinary advances in medicine... (eradication of smallpox, for instance, the Salk vaccine for polio, heart surgery, organ and limb transplants, and so on.)
...and technology.
It's been an amazing time to be alive.