The sixth "mass extinction event" in the history of planet Earth is currently under way, with over two hundred species dying off every day. The cause of this seismic event is also the source of the single biggest threat to human life: our own inventions.

But for all our talk about sea levels and biotechnology, do we really know what our future will actually look like? Will our immune systems be attacked by so-called super bugs, always evolving, and more easily spread than ever? Will the disappearance of numerous species cripple the biosphere? And if it does, what happens then? In this provocative, gripping book, Scientific American editor Fred Guterl explores these and other looming scenarios in vivid detail - the way they might really happen - and then proffers the means to avoid them.

We find ourselves in a trap: Technology got us into this mess, and it's also the only thing that can help us survive it. Guterl's riveting book is a grand and necessary thought experiment, not merely a scary story, but a fresh perspective on the world we're remaking, and a route to safe harbor.