Atheism has 'become Pepsi to the Coke of religion', a rival product differing in little but its branding. So argued Luke Bretherton in a recent article. In market terms, this comparison is generous to atheism. Christianity is more popular than Coke: it has about 2.3bn adherents worldwide, while Coca-Cola boasts 1.6bn drinks consumed daily. The global atheist population is roughly 137m: similar to ...