Cyclist Lance Armstrong cheated his way to seven Tour de France ‘victories’. Such cheating is wrong because it harms society. To explain how that harm affects all of us, I use Aristotle's ideas of virtue ethics to argue that Armstrong, despite his charitable work, is not a virtuous person. Virtue is to some extent determined by society, so we need to be clear that Armstrong is not a person to emulate. A society which does not clearly disapprove of vice is less than it might otherwise be because a good society is one that encourages virtue in its citizens.