Gilleasbuig Macmillan responds to the questions likely to be asked by an interested person wishing to know how the Christian faith began, what it teaches and how its followers have tried to practise and spread their faith through the centuries. The diversity of Christianity is taken into account, notably the division between the Orthodox East and the Catholic West, the Reformation and its consequences; the flow out from Europe with empires and the development from corporate 'tribal' religion to religion as a matter of individual choice.