The Swerve: How the Renaissance Began by Stephen Greenblatt Vintage, 2012, 365 pages, $19.95 It is about time someone did something about subtitles, which are now swelling to lengths unseen since the 1859 publication of On the Origin of Species by Means of Natural Selection, or the Preservation of Favoured Races in the Struggle for Life. (The most opprobrious example I can think of is Rod Dreher’s Crunchy Cons: How Birkenstocked Burkeans, Gun-Loving Organic Gardeners, Evangelical Free-Range Farmers, Hip Homeschooling Mamas, Right-Wing Nature Lovers, and Their Diverse Tribe of Countercultural Conservatives Plan to Save America or At Least the Republican…