Writing in an accessible journalist style, Denyse O'Leary guides the reader on a fascinating journey through the world of Intelligent Design (ID) and Darwinian evolution. The author approached this subject at the beginning with no clear convictions about it, nor any desire to enter a controversy. What emerged on these pages is a well-organized and clear introduction to the basic question of life's origins: What is life, and how did it come about? Did the universe arise by change, or was it designed? By Design or by change is a fresh intellectual breeze that clears ways much of the smog and dust obscuring core issues surrounding the origin of life. From cosmology to theology, from the philosophy of science to the text of Genesis, O'Leary address all with refreshing clarity.