Possibly the oldest book on this list. Plato’s republic is truly a testament to literature in that it withstood the test of time in a way that very few other books have. Plato’s Republic is older than the bible, and was written in the year (380 B.C.) This book is a socratic dialogue which means that the story revolves around a group of people trying to find an answer to a universal question. Understanding the mindset of ancient civilizations and how that mindset evolved with time will help us as individuals better understand the changes occurring within our own society today.