Another Earth Day has come and gone, and how are we doing? The 19th and 20th century systems of control of the earth have failed; there’s a connection between famines, global warming  and empire. Especially in the face of climate change, we have a lot to learn from indigenous and peasant systems; the idea of the commons is something we should learn from for a sustainable future. On this show Professor Jo Guldi, whose new book is The Long Land War, explains little known UN efforts and how planning for land use can address the global threat.