The Sophists were influential teachers and thinkers in ancient Greece who challenged traditional beliefs and emphasized the power of persuasive speech. They taught rhetoric, philosophy, and critical thinking to wealthy young men, shaping the intellectual landscape of Athens during its Golden Age. Relativism, a key concept associated with the Sophists, posits that truth and morality are subjective and dependent on individual or cultural perspectives. This idea, exemplified by Protagoras' statement "Man is the measure of all things," sparked controversy and debate about the nature of knowledge and ethics.