Evolving ourselves

Though these harbingers of change are deeply unsettling, the authors argue that we are also in an epoch of tremendous opportunity. New advances in biotechnology help us mitigate the cruel forces of natural selection, from saving prematurely born babies to gene therapies for sickle cell anemia and other conditions. As technology enables us to take control of our genes, we will be able to alter our own species and many others--a good thing, given that our eventual survival will require space travel and colonization, enabled by a fundamental redesign of our bodies. Future humans could become great caretakers of the planet, as well as a more diverse, more resilient, gentler, and more intelligent species--but only if we make the right choices now.