Those were not halcyon days for mathematicians, physicists and engineers. I'll take the juvenilization of the profession instead.
People's cat pictures were a vanishingly small portion of the landscape.
As an example, cheap computing power is one of the reasons that while at the beginning of the 90's, nuclear power was considered a money losing proposition by electric utilities and everyone was trying to get out from under them but by the end of the decade, all the utilities were hanging on to their nukes for dear life and trying to figure out how to extend their licenses/service life.
Now, a much bigger percentage of the focus is simply getting information out of one spot, tranporting it to another, dolling it up w/some marketing glitz.
That's not to say that the cool stuff isn't still going on, but that it is a smaller percentage and the profession has been dumbed down significantly (hence brogrammers and all).
No I don't want to go back.
I appreciate that scientists don't always have freedom of choice under a brutal regime.
Stalin was a western ally. Stalin was, without doubt, evil.
German scientists worked for the US; they were recruited through Operation Paperclip.
(http://en.wikipedia.org/wiki/Operation_Paperclip)
There's interesting stuff about President Truman's anti-Nazi directive (tl;dr: Don't use scientists who were (or were supportive of) Nazis) and the way that was ignored.
No he wasn't; he was just an ally. The term "western allies" excludes the Soviet Union, that's why I intentionally chose it: http://en.wikipedia.org/wiki/Western_Allies
German scientists that helped the US, to whatever extent they helped the US, did help to preserve our civilization, even if they tried to destroy it during the war. But let's ignore them; I'm talking about the thousands of American scientists and engineers worked on defense applications in the 20th century, and to some extent about those of Britain, Canada, France, and so forth.
When a man with his finger on the button of half the world's nukes says things like that, you damn well better put your best minds to work figuring out how not to let it happen.
http://en.wikipedia.org/wiki/Bomber_gap
The Soviets were, with some justification, terrified of a US first strike at the time.
What if there's a peaceful answer which sacrifices way of life instead of human life? Would supporting it be "luxury"?
At my first job we did some work in expert systems and Ai(applying it to engineering problems) and one guy moved from those projects because of his concerns sbout the source of the funding.