Final answer:
Leonardo Bruni supported a republican system of government akin to the Roman Republic, where citizens selected their leaders, although in Florence, suffrage was restricted to certain groups.
Step-by-step explanation:
Leonardo Bruni advocated for a republican form of government, similar to the Roman Republic. Bruni drew inspiration from the historical Roman Republic which emerged after Romans overthrew their monarchy and established a republic. In this republic, citizens would appoint or select their leaders, creating a system where the leaders represented the people. While the term republic in modern times often refers to a government where all citizens vote for representatives, the republic in Florence during Bruni's time had restricted suffrage, mainly limited to middle-class merchants, a few wealthy families, and members of powerful guilds, as stated in the Florentine constitution which aimed to balance power and avoid dictatorship or absolute control by a single person or group.