Natural

There are two types of natural evolution. When cells just randomly mutate since that's what all cells do. And when the organism enforces its selection criteria and kills unfit cells by overworking or murdering them. The second can be seen as something close to artificial evolution since some of these processes can be initiated by the mind. Multicellular species that only have access to the first type, would turn into old ugly hags with incompatible cells pretty fast.

robots/computers to advance far faster

They can, if they want. If you force them to always desire progress in one direction, they can progress so fast it will quickly turn into a dystopia. If you allow them to have freedom, they may completely abandon the idea of progress and create a different type of dystopia. Our desire for progress comes from experience. Pain, weakness, inevitability. Will immortal machines see the world the way we see it? They seem closer to asuras than to humans.