In the end, this search for ways to enhance ourselves is a natural part of being human. The urge to transform ourselves has been a force in history as far back as we can see. It's been selected for by millions of years of evolution. It's wired deep in our genes — a natural outgrowth of our human intelligence, curiosity, and drive. To turn our backs on this power would be to turn our backs on our true nature. Embracing our quest to understand and improve on ourselves doesn't call into question our humanity — it reaffirms it.