Alasdair Macintyre begins After Virtue with a parable: Populist demagogues declare war on the natural sciences. Every lab bombed, every chemistry department ransacked, every copy of Nature burned. Once the luddite swell subsides, a group of enlightened citizens attempt to reconstruct science from the remaining fragments. To us, natural science is a way of making sense of the physical world through experiment and observation. In this imaginary future, such a context has been lost. The new, reconstructed science is a wholly self-enclosed activity, like the creation of an imaginary language. Yet however hermetic this science may be, it is consistent; the proofs and the equations mean nothing, but they add up.