The K-Factor by Harry Harrison audiobook.
The human race has reached the stars, colonized many planets and done amazing things in all areas of scientific progress. But humans are still humans and remain both honorable and not so honorable; some with high ideals and others with very low ones indeed. So why hasn't war occurred in several centuries among the hundreds of planets? Has man really changed? Not on your life it hasn't! Read how science has given man peace but at what cost?