Plato (427-347 BCE), of a wealthy family and student of Socrates. Plato established a school of philosophy where he passed on style of learning and thinking based on that of Socrates.
It was Plato’s belief that if one acted right morally then one would have divine approval; and that philosophers were meant to rule because of all the knowledge they possessed. (www.philosophypages.com/ph/plat.htm)
Aristotle (384-322 BCE), educated by Plato for twenty years benefitted the most from Plato teaching. Aristotle was committed to teaching, research and writing; he was very thorough in his findings and pointed out a significant amount of real life issues such as ethics, biology, logic and philosophy to name a few.
Aristotle aimed to learn all that there was about reality, and that everything that happens has a reason for happening; and that moral conduct contributes to good life. (www.philosophypages.com/ph/aris.htm)
These two articles are related and both express similar ideas. Plato left too much on air and was not conclusive. Aristotle on the other hand was more thorough in the details of his work.
I am not sure how accurate the information contained in these articles is, but it conveys the message for the audience intended clearly. If the need for my recommendation of an article then it would be Aristotle.
Aristotle took all that was taught to him and perfected it far beyond what could have been expected. And his findings are what have shaped our legal system as it is today.