The twenty essays collected here-most of them written expressly for this book-offer a powerful rebuttal to the claims of the so-called 'Scientific Creationists, ' who have gained considerable exposure in recent years. The 'Creationist, ' using the Book of Genesis as their main authority, have argued that evolution is an unsound explanation of the origins of life and its diversity, and have sought in several states to introduce their ideas into public school curriculums.