Source: BBC News By Dr Rowan Williams Former Archbishop of Canterbury Christianity has a history that most of us know little about. A history that spreads eastward as well as westward, writes former Archbishop of Canterbury Dr Rowan Williams for BBC Newsnight. We would probably take it for granted that someone reading a religious text in Arabic would be a Muslim – but the truth is that you will find plenty of Christians reading their Bibles and books of prayers in the language. It is a sharp reminder of the diversity that once marked the Arabic-speaking world. It is a…