Someone always sounds the death knell for Harvard Square whenever a long-established business closes or a national chain store moves in. We’re certainly no fans of corporate homogenization, but the passing of Harvard Square, as Mark Twain once observed about reports of his death, has been “greatly exaggerated.” A few shop fronts change nearly as often as the fresh faces of each new class of students, but across the generations Harvard Square remains the crossroads of funk and philosophy, of idealism and consumerism, of red brick and green politics.