The ancient text regarded as the foundation of Western philosophy is Plato's "The Republic." Written around 380 BCE, this dialogue explores justice, the nature of the ideal state, and the philosopher-king concept. In "The Republic," Plato presents his vision of a just society and discusses the role of education, the nature of the soul, and the theory of forms. Through Socratic dialogue, Plato examines moral and ethical questions, laying the groundwork for future philosophical inquiry. The influence of "The Republic" extends beyond philosophy into politics, ethics, and education, prompting ongoing discussions about justice and governance that continue to resonate in contemporary thought.