In the Foundation series he sort of makes a point about on how the First Foundation is able to control their part of the galaxy because of minaturization...i.e. smaller nuclear devices lol. I do not know if minuratization in technology was an aim or idea prevalent in the 40s when he wrote the early books of the series but I was struck by him realizing how important it would be...or maybe he was not really aware of that at the time.
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Never was there a time when I did not exist, nor you, nor in the future shall any of us cease to be.
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