Infinite monkeys banging on the typewriter is essentially how evolution works. Mutation is random and undirected. Vast majority is "bad." You and I and the worm are only different from differential accumulation of these mutations. If they are tolerated enough not to kill us before we reproduce, then they stick around. If they give us the slightest edge to reproduce at a slightly better rate than something else, then over time, that mutation will dominate.

This dumb mechanism of randomly flipping bits essentially has generated all life on earth.