In monarchies and tyrannies only one person has the power. But an aristocracy is a small group of smart men leading the government, and was replacing monarchies as they died out. Sparta used a oligarchy and was one of the last to use it successfully, and oligarchy was becoming less common. Than Tyrannies, Tyrannies treated their people harsh under their rule of corrupt governments. Tyrannies were starting by 600 B.C. and became popular around the fifth century. In the Greeks democracy a group of 500 men determined issues, but all citizen could attend the assemblies. This is why the Democracy is still used today.