For the first time in Earth’s history, our planet is experiencing rapidly accelerating changes prompted by one species: humans. Climate change is the most visible and our current behavior threatens not only our own future but that of countless other creatures. As we stand at this pivotal juncture, Dr. Grinspoon calls upon all of us to be planetary engineers, conscious shapers of our environment, and caretakers of the Earth’s biosphere. With our future at stake Dr. Grinspoon shares his 10,000 year perspective by not only asking what kind of future we want to avoid, but what do we ultimately seek to build?