There is no one region. Christianity is around the world with millions of followers.
If you don't like Christianity, then why do you call it "the best the world can come up with"? You may want to investigate other religions; there may be one you like better.
Africa
Christianity began with the resurrection of Jesus Christ, which occured in Jerusalem in present day Israel. The movement spread to the region and into what is now Turkey and then into Roman provinces.
Palestine.
missionaries.
Christianity is the world's most popular religion, therefore it has been followed by practically every type of person from all over the world. If however you mean to ask who were the first followers of Christianity, we would have to say that all of the original disciples of Jesus were Jews. After that, Paul of Tarsus introduced Christianity to other people in the Mediterranean region, Italians and Greeks being among the first.
Usually where the white people are....
Christianity honey
Missionaries taught the people of Tanzania Christianity.
http://en.wikipedia.org/wiki/Religion_in_Nigeria#Christianity
Global Christianity, without 'the'