Gregory Vlastos was a prominent 20th-century scholar of ancient Greek philosophy. His book 'Platonic Studies' is a highly influential collection of essays that critically examines Plato's dialogues, focusing on his ethics, epistemology, and political theory. Vlastos is widely recognized for his rigorous analytical approach to interpreting Platonic thought and its relevance to contemporary philosophical discourse.

Plato is one of the most influential figures in the history of Western thought. As a student of Socrates and the teacher of Aristotle, he formed the core of the classical philosophical tradition. His dialogues explore fundamental questions regarding justice, the nature of reality, and the ideal state. By establishing the Academy in Athens, he created a center for intellectual inquiry that shaped the development of Western science, politics, and ethics for centuries.

Aristotle, in his 'Politics' and 'Nicomachean Ethics', emphasizes that the state exists not merely for life, but for the 'good life'. He argues that the primary function of the political community is to foster virtue in its citizens, as the development of character is essential for achieving the highest human potential.

After leaving Plato's Academy, Aristotle founded his own school in Athens known as the Lyceum, located in a grove dedicated to Apollo Lyceus. It became a center for systematic research and teaching, where Aristotle and his followers, known as Peripatetics, engaged in diverse studies ranging from biology and physics to ethics and political theory.

Aristotle first articulated the concept of distributive justice in his 'Nicomachean Ethics'. He argued that justice involves giving each person their due, specifically regarding the distribution of honors, wealth, and other divisible assets of the community. According to Aristotle, these should be distributed based on merit or contribution to the state, establishing a framework that has influenced political philosophy for centuries.

Aristotle identifies 'continence' (enkrateia) as a crucial state in ethical development. It involves the struggle to align one's actions with reason despite the presence of contrary desires. Unlike the virtuous person who acts rightly with ease, the continent person must exert self-control to resist impulses, representing the tension between rational deliberation and base appetites in the pursuit of the golden mean.

Aristotle's early intellectual career was heavily influenced by his observations of the natural world. His extensive biological studies, including the classification of marine life and animals, predated his more famous works on ethics and political theory. These empirical investigations formed the foundation of his methodology, emphasizing observation and categorization, which he later applied to his systematic analysis of political constitutions and human society.

In his 'Nicomachean Ethics', Aristotle argues that 'eudaimonia' (flourishing or happiness) is the ultimate human good. He concludes that the highest form of activity is contemplation (theoria), as it is the exercise of the highest human faculty—reason. Unlike external goods or social pleasures, contemplation is self-sufficient and aligns with the divine nature of the intellect, representing the pinnacle of human potential.

The 'Nicomachean Ethics' is one of Aristotle's most influential works, dedicated to his son Nicomachus. It provides a systematic investigation into the nature of virtue, the 'golden mean,' and the pursuit of 'eudaimonia' (flourishing or happiness), forming the bedrock of virtue ethics in Western philosophy.

Historical records indicate that King Philip II of Macedon invited Aristotle to the Macedonian court in 343 B.C. to educate his son, the future Alexander the Great. Aristotle remained in this role for several years, providing Alexander with a comprehensive education in politics, ethics, and science, which significantly influenced the young prince's worldview before he ascended to the throne.