The concept of the "Philosopher-King" originates from the works of the ancient Greek philosopher Plato. In his dialogue The Republic, he argues that the ideal ruler should be a philosopher, someone who possesses wisdom and knowledge about justice and the good life. This leader would govern not for personal gain but for the benefit of the entire society. Plato believed that a philosopher-king would be best equipped to make decisions that promote the common good, as they would understand the deeper truths of existence. This idea emphasizes the importance of wisdom in leadership, contrasting with rulers who may be driven by power or wealth.