A demagogue /ˈdɛməɡɒɡ/ (from Greek δημαγωγός, a popular leader, a leader of a mob, from δῆμος, people, populace, the commons + ἀγωγός leading, leader) or rabble-rouser is a leader in a democracy who gains popularity by exploiting prejudice and ignorance among the common people, whipping up the passions of the crowd and shutting down reasoned deliberation. Demagogues have usually advocated immediate, violent action to address a national crisis while accusing moderate and thoughtful opponents of weakness or disloyalty. Demagogues violate established rules of political conduct; most who were elected to high office changed their democracy into some form of dictatorship.