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Aristotle distinguished between natural motion and violent motion. Natural motion is self-caused and persistent, while violent motion is externally caused and transient.

Plato and Aristotle were both Greek philosophers.

Ralph Waldo Emerson believed in the power of the individual and in the importance of living in harmony with nature.

Yale University is one of the oldest institutions of higher learning in the United States and one of the nine Colonial Colleges founded before the American Revolution. Yale has produced a long line of successful alumni, including five U.S. Presidents, 19 U.S. Supreme Court Justices, and numerous living billionaires and foreign heads of state.

Cornell University is known for its rigorous academic programs as well as its beautiful campus located in Ithaca, New York.

Immanuel Kant developed the ethical system of deontology, which states that an action is only morally good if it is done for the sake of duty.

Karl Marx’s ideas inspired the Bolshevik Party, which seized control of the government in the Russian Revolution of 1917.

He was unhappy with the university and felt that he was not receiving the best education possible. Additionally, he was struggling financially and could not afford to stay at the school.

Thomas Aquinas was a 13th century Italian Dominican friar and Catholic priest. He is an immensely influential philosopher, theologian, and jurist in the tradition of scholasticism, within which he is also known as the Doctor Angelicus and the Doctor Communis.

Aristotle argued that the ability to reason is the most important aspect of adolescence. He believed that adolescents who can reason well are more likely to make good decisions and lead successful lives.