Socrates

He wrote nothing, owned nothing, and claimed to know nothing. Yet Socrates transformed how humanity thinks. Born to a stonemason and a midwife in 5th-century Athens, he spent his days in the marketplace, engaging anyone, generals, politicians, craftsmen, slaves, in conversations that left them bewildered, sometimes enraged, always changed. His method was simple: ask what they mean by their confident words (justice, courage, piety), then follow the logic until contradictions emerged. He called himself a 'midwife of ideas,' helping others give birth to their own understanding. Athens eventually charged him with corrupting the youth and disbelieving in the gods. He could have fled or begged for mercy. Instead, he drank the hemlock, arguing to the end that an unexamined life is not worth living. Two thousand years later, we still call the relentless pursuit of truth through questioning 'the Socratic method.'