Astrology has been in existence for about 4,000 years, and apparently it is still in very good health. As empires are born and fall, continents move, religions appear and disappear and humanity evolves, Astrology not only survives but is increasingly
This is more than just a list of enemy interstellar empires. Often the implications of an author's faster-than-light drive help define the sort of threats the space navy will be facing. Many authors adopt something like Niven and Pournelle's Alderson Jump Drive to avoid giving the space nav...