While humans have been evolving since life on earth began, the geological, paleontological, and natural explorations of the eighteenth and nineteenth centuries, which revealed that the Earth was far older than had previously been imagined, that led to the questioning of biblical beliefs in creation. Even before Darwin, there were scientists who set the stage for the "survival of the fittest." The Complete Idiot's Guide® to Evolution offers a beginner's/re-learner's look at the science and the controversy surrounding it.