Do visionaries – artists, writers, musicians, – have a responsibility to give us new languages and tools to actually do something about our deteriorating world? I asked. Artists David Bramwell, Justin Brice Guariglia, Olafur Eliasson, Antony Gormley and Jonathan Meese, writers Jay Griffiths, Caspar Henderson, Dahr Jamail and Barry Lopez, poet Craig Santos Perez, philosopher Graham Harman, and scientist Peter Wadhams wrote me back.