In a narrative style, Emily Monosson explains how humans are driving rapid contemporary evolution through the use of toxic chemicals and what we can do about it. Gonorrhoea. Bed bugs. Weeds. Salamanders. Polar Bears. People. All are evolving, some surprisingly rapidly, in response to our chemical age. In Unnatural Selection, Emily Monosson shows how our drugs, pesticides, and pollution are exerting intense selection pressure on all manner of species. And we humans might not like the result.