Can any one please tell me why Plato wrote "THE REPUBLIC?"?

Question: Can any one please tell me why Plato wrote "THE REPUBLIC!?"!?
Best Answer - Chosen by Asker:

To expound his views on government and the desirability of the philosopher-king over other types of ruleWww@QuestionHome@Com

Aristotle wrote a book, so plato felt the need to write on too!. It's like today with famous actors!. They all seem to feel the need to write a childrens book!.Www@QuestionHome@Com