The premise of genetically mutated humans is interesting and disturbing at the same time. Also, the setup with a human dictator ruling the Earth is critical, being written in 1940. Then, there’s hilarious technology and plot. It’s a wild rollercoaster ride without any thought to plausibility. Some strands of the plot lead nowhere or are simply superfluous. The character development simply isn’t there. If a character changes, it’s without any discernible steps. The world is black and white with no intermediate steps. One sole Slan single-handedly develops and produces the most outstanding new machines and technologies. I can’t believe this ever stood out. Nonetheless, 2* only because of the inventiveness.