[goksankobe]

Where would you start though? On software level, I can imagine how this could work, based on genetic algorithms where offsprings evolve by sharing the weights of their neural networks from parents. But self-replicating hardware is quite challenging isn't it?

[mikewarot]

Machine shops make parts for machine shops, with a lot of human labor and control.

So... Just start with machines that can mine and refine metals.