A Whole World of Metal Men? (1937)
Reading about robots as envisioned in the 1920s and 30s, it is always a question of when robots would replace humans in every facet of life, rather than if. This article from the October 17, 1937 San Antonio Light (San Antonio, TX) paints a pretty bleak picture of the future of humankind. You really need to read the full article to appreciate just how far along this robo-dystopia had been imagined.
But Professor von Schmidt saw the possibility of robots becoming so well-developed mechanically that they will automatically be abel to control each other, and will outlive and perhaps wipe out their creators, man. They may become such perfect "supermen" that will despise their inferior inventors and keep them locked up in reservations and escape-proof prisons until the race dies out.
As terrible and fantastic as all this may sound, thoughtful men in Europe think it is becoming a likelihood with inventions already perfected by science. Indeed, a peep at this world of the future has been given in some extremely interesting pictures, a few of which are shown on this page.