He concludes that democracy risks bringing dictators, tyrants, and demagogues to power. The Greek historian Polybius thought that democracies are inevitably undone by demagogues. Some politicians and demagogues explored the potential of the discs as a medium for propaganda. Demagogues have appeared in democracies since ancient Athens. Demagogues have arisen in democracies from Athens to the present day. Demagogues overturn established norms of political conduct, or promise or threaten to do so. He stayed away from politics and was repelled by the persecution of the so-called demagogues. This persecution of demagogues, "Demagogenverfolgung", was especially vigorous in Prussia. The news media informs voters, and often the information is damaging to demagogues. Demagogues were a new kind of leader who emerged from the lower classes.