For four billion years| what lived and died on Earth depended on two principles: natural selection and random mutation. Then humans came along and changed everything — hybridizing plants| breeding animals| altering the environment and even purposefully evolving ourselves. Juan Enriquez provides five guidelines for a future where this ability to program life rapidly accelerates. ""This is the single most exciting adventure human beings have been on|"" Enriquez says. ""This is the single greatest superpower humans have ever had."