Answer: Socrates.
Some extra relevant information:
The three great philosophers of ancient Greece were Plato, Aristotle, and Socrates. Socrates, widely regarded as one of the founders of Western philosophy, played a crucial role in shaping the philosophical landscape of ancient Greece. Born in Athens in the 5th century BC, Socrates was known for his Socratic method of questioning, which aimed to stimulate critical thinking and uncover truth. Despite not leaving behind any written works, his teachings heavily influenced the thinking of his students, including Plato and Aristotle. Socrates’ emphasis on self-examination, moral integrity, and the pursuit of knowledge left a lasting legacy and continues to inspire philosophical discourse to this day.