This work investigates how the Medici family established and maintained political control over the Florentine Republic between 1434 and 1494. Nicolai Rubinstein, a renowned historian of the Italian Renaissance, utilizes extensive archival research to analyze the constitutional mechanisms and informal power structures that allowed the Medici to dominate the city-state. The text argues that the Medici regime functioned through a complex interplay of traditional republican institutions and personal patronage networks, effectively subverting democratic processes while maintaining the appearance of a functioning republic.

Scholars and historians widely regard this work as the definitive academic study on the political mechanics of the early Medici period. Readers frequently note the high density of the prose and the rigorous attention to archival detail, making it a foundational text for students of Renaissance political history.