In his classical book, The Republic, Plato has his brothers, Glaucon and Adeimantus, engage Socrates in a conversation about whether it is being just, or having a reputation for being just that makes people to happy. The brothers construct their argument by invoking the mythical ring of Gyges which was supposed to make people invisible at will. The brothers hypothesized that if such a ring existed, one can tell the true nature of human beings. A person wearing the ring of Gyges will have no constraints on his actions but will be steal, kill and live wildly without any fear of negative consequences. Since there is no real ring of Gyges, Glaucon and Adeimantus argue that people only act virtuously to escape consequences in the form of damage to their reputations when they are caught.