Charles Darwin's education gave him a foundation in the doctrine of Creation prevalent throughout the West at the time, as well as knowledge of medicine and theology. More significantly, it led to his interest in natural history, which culminated in his taking part in the second voyage of the Beagle and the eventual inception of his theory of natural selection. Although Darwin changed his field of interest several times in these formative years, many of his later discoveries and beliefs were foreshadowed by the influences he had as a youth.
Born in 1809, Charles Darwin grew up in a conservative era when repression of revolutionary Radicalism had displaced the 18th century Enlightenment. The Church of England dominated the English scientific establishment. The Church saw natural history as revealing God's underlying plan and as supporting the existing social hierarchy. It rejected Enlightenment philosophers such as David Hume who had argued for naturalism and against belief in God.
The discovery of fossils of extinct species was explained by theories such as catastrophism. Catastrophism claimed that animals and plants were periodically annihilated as a result of natural catastrophes and then replaced by new species created ex nihilo (out of nothing). The extinct organisms could then be observed in the fossil record, and their replacements were considered to be immutable.
Darwin's extended family of Darwins and Wedgwoods was strongly Unitarian. One of his grandfathers, Erasmus Darwin, was a successful physician, and was followed in this by his sons Charles Darwin, who died while still a promising medical student at the University of Edinburgh in 1778, and Doctor Robert Darwin, Darwin's father, who named his son after his deceased brother.