Most Effective Altruists don’t look like anarchists. The latter have a (charmingly) grungy flavor, the aura of half-dazed rebels perennially stumbling their way out of Woodstock reunions. By contrast, Effective Altruists have the trappings of recent MIT and Tufts graduates, lanky tech nerds and philosophy majors with an incomprehensible infatuation with “Pi Day” and something…