Lewis used his own story — and his book Moneyball — to build toward this central argument about luck. He showed how even professional baseball players, with statistics attached to every move and millions of people evaluating them, were systematically misvalued because experts couldn't distinguish between lucky and good. If a pure meritocracy like professional sports can't properly account for luck, Lewis asked, who can? He then turned this insight on the Princeton graduates themselves, arguing that their success was not entirely earned — they were lucky in their parents, lucky in their country, lucky to attend Princeton — and that this luck created an obligation to those who didn't share it.