Protagoras
Protagoras was a philosopher is ancient Greece who spent a huge portion of his adult life imparting knowledge on others. He mostly taught the art of arguing. He would teacher people the skills on how to argue against any opinion.
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With the pursuit of truth, he was always prepared to follow an argument to wherever it lead.
Protagoras was a chief sophist. The word sophist has the same meaning as professor. A sophist was a man who earned his living from educating young men on live skills.
One of the leading followers of Protagoras was the great founder of Pragmatism F.C.S Schiller.
Philosophers argue that health is better than sickness. Philosophy is an interesting subject. For instance, Thrasymaches made an argument that there is nothing like justice except serving the interest of the stronger people in the society.
On why government makes laws, it is argued that laws are made to serve the interests of government.