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  Plato held that moral values are objective in the sense that they exist in a spirit-like realm beyond subjective human conventions. He held that they are absolute, or eternal in that they never change, and also that they are universal insofar as they apply to all rational creatures around the world and throughout time.
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  Aristotle being concerned with action, not as being right in itself irrespective of any other consideration, but with actions conductive to man's good.As Copleston say Aristotle sets himself to discover what this good is and what thr science corresponding to it is.
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  Socrates worked to critically examine the foundational beliefs that were common in Greece during his time, and encouraged other citizens to do so as well.
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