The book discusses ideas concerning the order and balance of nature (or "economy of nature") from the late 17th century to the early 20th century. The perspective taken is broad, longue durée and interdisciplinary, and reveals the interplay of scientific, philosophical, moral and social ideas.  The story begins with natural theology (dating roughly to the onset of the so-called Newtonian Revolution) and ends with the First World War. The cut-off date has been chosen for the following reasons: the war changed the state of things, affecting man's way of looking at, and relating to, nature...