The fourth century BCE in Ancient Greece was a time of significant political and cultural shifts. Athens' defeat in the Peloponnesian War led to Sparta's dominance, while Thebes and Macedon rose to power. This period saw the trial of Socrates and the founding of Plato's Academy. Philosophical thought flourished with Plato, Aristotle, and various schools of thought. Art and literature evolved, becoming more naturalistic and expressive. The century concluded with Philip II's expansion of Macedon, setting the stage for his son Alexander's conquests and the spread of Hellenistic culture.