LBJ, Lyndon Baines Johnson -- Texan, Democrat, political virtuoso. He rises up out of the 1960s like a Colossus, like something from Shakespeare, filling the stage -- 10, 12 characters in one. He is admired and he is detested. But the real measure of a leader is what he gets done, the size of the problems he faces. Before Lyndon Johnson, we were essentially a segregated society. Inequality among black Americans in the South was set in law. Before...