Astrologers researched and correlated the beginning and end of several empires including Roman Empire, and on its Pluto return (one revolution around the Sun from point of commencement) the empire made drastic changes or ended. I have not performed my own calculations but my wife is into to this and I will say her sources have been lining up with our sources/ research the past six-seven years so strap on your seat belts boyz and girls...