Answer:
Socrates, Plato, and Aristotle
Socrates Socrates believed that philosophy should achieve practical results for the greater well-being of society
Plato The theory of Forms or theory of Ideas is a philosophical theory, concept, or world-view, attributed to Plato, that the physical world is not as real or true as timeless, absolute, unchangeable ideas.
Aristotle Aristotle initially claimed that everything was made up of five elements: earth, fire, air, water, and Aether. Aristotle is also famous for his “four causes,” which explain the nature of change in an object. Its material cause is what it is actually made of. Its formal cause is how that matter is arranged
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