Well not quite all of the world. There is a faction, which includes Cabal in it's ranks, who have continued the pursuit of progress and science and now possess a fleet of incredible flying wings which easily defeats The Boss's ragtag band. The world is united in progress. We then jump to 2036 and Cabal's and Passworthy's descendants live in an Art Deco wonderland od underground cities, and everyone wears cloaks. However, the latest project to send people around the Moon raises the ire of artist Theotocopulos (Cedric Hardwicke) who thinks the relentless march of progress must finally be stopped...
The film is very interesting rather than being overtly entertaining. The far future part of the film looks amazing (though future society despite the wonders of science seems to be as patriarchal as the 1930s). The downsides of endless scientific progress are not explored, bashed aside as irrelevant when they are mentioned. But what a vision, perhaps that is how it could have been... or be?