In "On the State - De re publica," the Roman statesman and philosopher Marcus Tullius Cicero outlines a comprehensive concept regarding the organization and purpose of the state. Through the form of a dialogical essay, Cicero discusses central questions of justice, civic duties, and ideal governance. The literary style is characterized by clear, rhetorically brilliant language that combines both philosophical depth and political practicality. The context of the work is shaped by the turbulent political situation in late Rome, which prompted Cicero to seek stable foundations for a just society and to illuminate the virtues of a republic. Cicero, a significant thinker of ancient Rome, was not only an excellent orator but also an influential politician and philosopher. His experiences as consul and his intense engagement with the Roman Republic and Greek philosophical thought shaped his arguments. The idea of "Res publica," as a space where the common good is prioritized, was developed by Cicero as a guiding motif of his reflections. This book is recommended for any reader interested in politics, ethics, and the foundations of democracy. Cicero's profound analyses and his eloquent presentation provide valuable insights into the challenges and possibilities of the state. "On the State" remains relevant in today's political discourse and encourages reflection on the principles of just coexistence.