Rhetoric was the skill that Isocrates sought to develop, but that development, he insisted, could come only with natural talent and the practical experience of worldly affairs that trained orators3 to understand public issues and the psychology of the people whom they had to persuade for the common good. Isocrates saw rhetoric therefore not as a device for cynical self-aggrandizement but as a powerful tool4 of persuasion for human betterment, if it was wielded by properly gifted and trained men with developed consciences. Women were of course excluded from participation because they could not take part in politics. The Isocratean emphasis on rhetoric and its application in the real world of politics won many more adherents among men in Greek and, later, Roman culture than did the Platonic vision of the philosophical life, and it would have great influence when revived in Renaissance Europe, two thousand years later."
Credit
More info...
Works by Isocrates