Gathering his most compelling essays and addresses from the last fifty years in one accessible volume, this book looks at the pioneering ideas that underpin Sim Van der Ryn's ecological design philosophy. It offers a unique decade-by-decade retrospective of the key issues in environmental design, beginning with the most recent years and looking back to the 1960s. With an introductory chapter and further recommended reading for each decade, this book is key reading for any architect or designer practising today, and students will find a wealth of knowledge with which to support their studies. The author's beautiful illustrations, painted in a corresponding timescale to the chapters, offer further insight into the way he understands the challenges of humanity's stewardship of our planet.