The 5th BC century was undoubtedly a time of important historical events and intellectual achievements of the Greek world. Between the Persian and the Peloponnesian War, architecture, painting, sculpture, theater, philosophy, rhetoric presented an admirable activity of a high level. The center of the cultural flourishing of the Greek world of the 5th century was the city-state of Athens and this century became known in history as the Golden Age of Pericles.
The focus of the philosophical thought of the golden age presents a significant shift. There is a decrease in its cosmological interest and a turn towards man and his soul. The philosophical movement that first dealt with these great issues was the sophistry.
The sophists were interested not only in the issues of human knowledge and practice but also in psychology, behavior, positions and relationships within society, social phenomena and culture. They were moving from city to city to teach as professionals rhetoric, dialectics, ethics, political theory, mythology, music theory, astronomy and meteorology. Their goal was to make their students as capable as possible in thinking, speaking and acting, in order to be as successful as possible in their lives and to contribute to social developments.
The father of sophistry was Protagoras (490/485 - 420/ 415 BC), who supported the uninterrupted variability of things. He believed that things can not be said to be one way or another but that they are as everyone sees them at every moment. He also argued that man can know nothing about the gods because they are invisible and human life is short.
Another extremely important sophist was Gorgias (490 / 483 - 380 / 376 BC). He opposed the Eleatic belief that facts are almost illusions and defended common sense and the daily experience of people as the only criteria for knowledge. He also argued that the human crisis is based not on objective truths but on current, unproven and often contradictory perceptions and prejudices. The denial of the absolute truth, led Gorgias to the belief that man has no knowledge but only an opinion of reality.
Gorgias was the first philosopher who strongly believed in the power of speech. So at first he turned his attention to rhetoric, which was for him a way of convincing man of what the rhetor was seeking each time. He was, therefore, the first to study the effect of speech on the human psyche. He stated that "speech can stop fear and sadness, can activate joy and can increase compassion". He argued that speech is for the soul what drugs are for the body. He said that art, magic and religion are based on the same principle as speech, which seek to "charm" the soul and "transform" it into the state they want.
A third important sophist was Antiphon (480 BC - 410 BC). He argued that nature and law are opposite. Nature does not distinguish between Greeks and barbarians, free and slaves. For his happiness someone must give importance to natural law over man's law.
Other important representatives of sophistry were Prodicus, Thrasymachus and Kritias. The latter was the first to deal with the forms of states, the discoveries and the history of civilization. Finally, Hippias was the "encyclopedist" of sophistry. He wrote introductions to dialectics, geometry, astronomy, music, rhythm and dealt with problems of art theory, prehistory and linguistics.
The importance of sophistry was that it brought to the center of the study man, his knowledge and practice, founded dialectics and logic, initiated psychology, took an interest in social problems and studied the origin of language, art and culture in general.
