Who is Aristotle from The Politics of Aristotle and what is their importance?

This is the author of the book. He lived for 62 years during the 3rd and 4th centuries BC. He was a Macedonian, but spent much of his life living in one of the Greek city-states.

His family must have harbored a good reputation and he came into the advantage of some powerful friends. Due to these factors, and his own very real great skills and talents, he prospered at least part of the time. One of his jobs was humble enough in itself, yet respectable: he was a private tutor. His student, however, was the top of the upper class: Alexander, Prince of Macedon. Aristotle worked with this young man for two years. Alexander was able to follow in the footsteps of his father. When he did so, he became the King of Macedonia and then followed through on conquest plans at least partially worked out for him by his father. When he did so he earned the reputation that we still know him by: Alexander the Great.