Systems thinking is necessarily interdisciplinary, so that the thinkers selected come from a wide range of areas – biology, management, physiology, anthropology, chemistry, public policy, sociology and environmental studies among others. A significant aim of the book is to broaden and deepen the reader’s interest in systems writers, providing an appetising ‘taster’ for each of the 30 thinkers, so that the reader is encouraged to go on to study the published works of the thinkers themselves.