Before Charles Darwin, most Christians believed in special creation. The fathers of the Church, from studying the Septuagint, estimated that the earth is about 7,500 years old. It should be considered reasonable for a Christian to believe what the Church has traditionally taught, as long as he doesn't attempt to teach it as science. It should be remembered that Creation is a theological concept, not a scientific one. Science and theology each have their own particular sphere and function. Believing the doctrine of Creation doesn't make one a fool, and neither does believing evolution make one any better of a person. There should be no reason to debate, given that faith isn't acquired by argumentation but through God's revelation to the human heart.