The purpose of this book is to show how the science of biology has been influenced by ethical, religious, social, cultural and philosophical beliefs as to the nature of life and our human place in the natural world. It follows that there are accounts of theories and investigations from those of Aristotle to research in molecular biology today. These have been selected to illustrate the theme and there is no intention to present a comprehensive history of biology. It is suggested that ethical beliefs in particular have a greater influence in biology than in other sciences, such as physics and...