It's logical. Survival of the fittest was initially driven by the environment; then we formed civilizations, and culture influenced what "fittest" was. Now we have technology that defines the "fittest" further. The urban fittest of the future could end up being people succesful enough to pay for advanced medicine.
Evolution still happens when creatures reproduce at different ratios, but civilization and tech allows people to survive and/or reproduce when they naturally wouldn't.
Evolution still happens when creatures reproduce at different ratios, but civilization and tech allows people to survive and/or reproduce when they naturally wouldn't.