Why have societies that were once overwhelmingly Christian become so secular? We think we know the answer, but in this lively and startlingly original reconsideration, Alec Ryrie argues that people embraced unbelief much as they have always chosen their worldviews: through their hearts more than their minds. Looking back to the crisis of the Reformation and beyond, Unbelievers shows how, long before philosophers started to make the case for atheism,...