It appears to me that a single idea transpires through Isaac Asimov’s “New Guide to Science”, Carl Sagan’s book “Cosmos” and many more: this idea is Cosmism.
Konstantin Tsiolkovsky was a true legend, the inventor of astronautic and a pioneer of conceptualization of space exploration. He was anchored in the tradition of Russian Cosmism.
The (Soviet) film about him “Road to the Stars” was used (copied?) in several parts by Kubrick for his “2001:A Space Odyssey” as some researchers maintain.
At that time (mid 1950s) Soviet space research had the lead. Stalin had passed away since only 4 years when the Sputnik was launched: it was his posthumous triumph, for the good or for the bad.
Notable ideas here: “zoo hypothesis” in