John Powers

If any image haunts TV news, and perhaps our conscience, it's the seemingly ceaseless river of migrants seeking refuge from war, dictatorship and poverty. These desperate souls inspire pity, fear and election-year arguments about whether to offer them welcome or keep them out.

One of my favorite professors, the late Ian Watt, taught that there were four great myths of modern individualism: Faust, Don Juan, Don Quixote and Robinson Crusoe. This always got me wondering which, if any, pop-culture heroes might endure in the same way. James Bond? Luke Skywalker? The Avengers? C'mon. In fact, there's only one who I feel sure will last — Sherlock Holmes.