Erudite and engaging, The Green Ages presents a powerful critique of the ideologies of the ‘modern age’ by historicizing their guiding image of the human as the self-interested Homo economicus. Excavating times when sharing, recycling, cooperation, and frugality were some of the reigning values in Europe, Kehnel makes a point crucial to any imagination of change: another world is possible. An important book for all students of sustainable futures.