My wife and I both watched it after reading "The Making of the Atomic Bomb" (1987) a year ealier. I had to read it twice; once for the interconnnected social/professional lives of the scientists, then to understand some of the p chem.
So, when we saw the movie we did not expect it to be exhaustive. First, it starts in 1939. Secondly, it leaves out the impact of HG Wells on the philosophy of many of the scientists. It also leaves out how the Facists screwed themselves or that Churchill himself recommended Fuchs to FDR.
Still, it hit some of the political and philosophical points which, in my experience, many Americans fail to grasp.
The book makes it clear that Truman's decision to "hide it" from Stalin and the rest of the world reverberates today.
To me the whole episode reflects lost opportunities that have a lot to do with hubris. Including the scientists thinking they could actually run policy. Including Fascists thinking they could advance without intellectuals.
Got me reading HG Wells though. Very thoughtful guy. Which led to reading some thought pieces by survivors of WWI. 1930s was a period of deep soul searching.
Just made the mistake of reading "Red Dawn". I had watched the movie as a kid; it was entertaining back then. My advice: do NOT read the book. I was depressed for a week.
So it goes.
Dewey