Around 50 CE, a small group of travellers began to preach that a Jewish man, crucified by the Romans, had risen from the dead. Teaching love, forgiveness and eternal life, this new faith quickly gained followers. By the early fourth century, it was thriving, and over the next hundred years, it exploded, spreading across the entire Roman Empire before becoming its official religion. What enabled it to take such a strong hold so quickly and so steadfastly?

Dan is joined by author, broadcaster and historian Professor Alice Roberts to examine how Christianity out-organised and outlasted the Roman Empire.

Alice's new book is called 'Domination: The Fall of the Roman Empire and the Rise of Christianity'