We often say, upon the passing of a friend or loved one, that the world is a poorer place for the loss. But with the untimely death of programmer and activist Aaron Swartz, this isn't just a sentiment; it's literally true. Worthy, important causes will surface without a champion equal to their measure. Technological problems will go unsolved, or be solved a little less brilliantly than they might have been. And that's just what we know. The world is robbed of a half-century of all the things we can't even imagine Aaron would have accomplished with the remainder of his life.