One of the most valuable books of political thought; The "Republic" in which justice is achieved, as Plato, BC, showed about four decades. The book, which was translated by "Hanna Khabbaz" into the Arabic language is a political philosophical dialogue, through which Plato shows his vision of the ideal state or the virtuous city of the Socratic; Socrates is the main axes, and around him several personalities argue and argument, and with the escalation of the controversy, the features of the imagined republic of Plato. In the Republic of Plato, each member of society belongs to a specific class, works in a specific field of specialization, and the balance is achieved between the three powers that make up society: rational power, anger power, and lustful power. While he tries to provide a definition to the just ruler and meets him with the tyrannical ruler, governments are divided into four types: aristocracy, oligarchy, democracy, and authoritarianism. On the one hand, he declares his tendency to constitutional monarchy, and on the other hand, he admits that absolute justice remains difficult to verify.