Ah, Wilderness! is the lone comedy in Eugene O’Neill’s eye-gougingly tragic catalog. It works as a sort of photo-negative of his later, bleaker masterpiece A Long Day’s Journey into Night, with which it shares the setting of a “large small town” in early 20th century New England. Written in the early years of the Great Depression but set in the happier days of 1906, it’s a deliberately idyllic take on the sweet miseries of…