The document summarizes the political evolution of Italian city-states from the 12th to 15th centuries. It describes how city-states became autonomous from the Holy Roman Empire and feudal system, adopting republican governments dominated initially by merchant and noble classes. As the centuries progressed, many city-states transitioned to despotic rule as wealthy families like the Medicis in Florence seized power. Republicanism gave way to oligarchy and intrigue as class conflicts and economic troubles increased.