Tyranny is when a nation is ruled by a cruel and oppressive government like when Hitler was the dictator of Germany, Democracy is what the US has, its <span>a system of government by the whole population or all the eligible members of a state, typically through elected representatives, like when we get to vote for president and stuff.</span>
I would say the Hittites and the Celts. The Hittites thrived and disbanded before the beginnings of the Roman empire. The Celts were absorbed by the Romans but were keen to follow their ways.
They created a limited government because they were escaping an oppressive one. They had been under the rule of Great Britain, a basically unlimited government. They did not want to create the same thing to replace the one that they had known.