鋼鉄都市
The Sirians' ideology is similar to that expressed by the Spacers in Asimov's "The Caves of Steel", published a few years earlier - though Starr's Earth is very different from the one depicted in that book. An even more similar ideology is described in "The Key", one of Asimov's stories featuring Wendell Urth, where an extremist faction named the Ultras wants to establish such a society on Earth using a very similar rhetoric.