How does evolution do cumulative, combinatorial things?

But the difference is that these cultures never expand, never grow, never accumulate, never become combinatorial, and the reason is because there is no sex, as it were, there is no exchange of ideas.

Within a short while, I think there's going to be a new field called Combinatorial Genomics, because with these new synthesis capabilities, these vast gene array repertoires and the homologous recombination, we think we can design a robot to make maybe a million different chromosomes a day.