Lunacy and Letters has all the sharp wit and insights that are characteristic of Chesterton's writing. There is focus in this collection on proper education in history and the important role that that knowledge plays in better understanding industry, architecture, literature, and other aspects of human life. To know history, he posits in another anthology, is to know humanity. Through the essays in Lunacy and Letters, this point is well-made.
Essays of note (including original year of publication): On Being Moved (1909), The Grave-digger (1907), History versus the Historians (1908), The Heroic That Happened (1909), The Bigot (1910), and The Roots of the World (1907)