This edited collection gathers contributions from a diverse range of renowned scholars and professionals to uncover the unique relationship between passive architectural systems and activism. Focusing on the pioneering work of the influential American chemist and inventor, Harold R. Hay (1909–2009), and the environmental awareness events that took hold in the United States during the 1960s and 1970s, the book assembles essays which closely examine Hay's contribution to architecture and the work of those who directly and tangentially were affected by it. The book also offers insights into the role of passive energy design today. Appealing to researchers, architects and students interested in architecture and design technology, Activism in Architecture explores the role of passive environmental inventions as an active agent in shaping socio-political debates.