"The tragedy of our time has been happening all around us, barely noticeable from day to day—the loss of our planet's wild places, its biodiversity," observes David Attenborough. "I have been witness to this decline." Reflecting on his seven-decade career as a naturalist, Attenborough assesses where and how it all went wrong, and here he offers informed, inspiring ideas on how we can still create the perfect home for ourselves and restore the wonderful world we inherited.