Did tyrants develop democracy in Greece?
Tyrants usually preceded democracy. They were appointed in various cities by popular will to get rid of the aristocratic cliques and run a city-state to the general benefit of the people rather than the vested interested of a few. A tyrant had to maintain a bodyguard to protect himself from the aristocrats, and to hire them had to impose a tax on the people, which eventually made the tyrant as unpopular as the aristocrats had been. So the cities progressively expelled the tyrants and some tried the experiment with democracy - with mixed success.
Failures with democracy resulted in some cases in a return to aristocrats, monarchs or tyrants to sort out the mess. Most cities then turned to a compromise of a form of limited democracy where the magistrates allowed the people to vote yes or no on issues they put before them.