Once upon a time, Christianity in Australia was seen as the One True Faith. These days, it is likely to be conceived as an option on a smorgasbord, to be taken in easy-to-digest pieces or, more usually, left entirely for more exotic choices. Williams is interested in how this happened, especially since, in 1901, 96 per cent of Australians identified as Christian and half regularly attended church, making Australia one of the most Christian countries in the world.