“Who is this guy and why haven’t I heard of him?” I’ve heard the question more than once. It is asked by people who have just started to discover G.K. Chesterton.They have begun reading a Chesterton book, or perhaps have seen an issue of Gilbert! magazine, or maybe they’ve only encountered a series of pithy quotations that marvellously articulate some forgotten bit of common sense. They ask the question with a mixture of wonder, gratitude and … resentment. They are amazed by what they have dis…