Carlos Garcia Sierra

In the last five years, eight states have legalized recreational marijuana. To many, continued progress seems certain. But pot was on a similar trajectory 40 years ago, only to encounter a fierce backlash. In Grass Roots, historian Emily Dufton tells the remarkable story of marijuana's crooked path from acceptance to demonization and back again and of the thousands of grassroots activists who made changing marijuana laws their life's work.

One hundred thousand years ago, at least six human species inhabited the Earth. Today there is just one. Us. Homo sapiens. How did our species succeed in the battle for dominance? Why did our foraging ancestors come together to create cities and kingdoms? How did we come to believe in gods, nations, and human rights; to trust money, books, and laws; and to be enslaved by bureaucracy, timetables, and consumerism?