Humans have been shaping the course of evolution for a long time, but with today's gene editing technologies our power to determine the fate of life on Earth is reaching new levels. With the extinction crisis looming, should we use these new editing tools to rescue threatened organisms? Are we playing god? In her new book, Life As We Made It, Beth Shapiro helps us understand our long history exerting evolutionary pressure, the state of the science, and the ethical questions confronting conservationists today.