The Republic by Plato - The Republic is Plato's most famous work and one of the seminal texts of Western philosophy and politics. The characters in this Socratic dialogue - including Socrates himself - discuss whether the just or unjust man is happier.
Plato Silanion Musei Capitolini Plato was also a mathematician but most importantly he made the foundation for philosophy and science.
Refreshing take on one man's journey through western philosophy. Read the review at The Independent: http://www.independent.co.uk/arts-entertainment/books/book-review-onward-and-upward-confessions-of-a-philosopher-by-bryan-magee-weidenfeld-nicolson-pounds-1254515.html