Fourth Great and Bountiful Human Empire

The Forth Great and Bountiful Human Empire was an empire from when Earth was (supposedly) at its height - the planet itself was covered in megacities and five moons, and its influence supposedly spread across "a million planets and a million species".

History
In the year 199,909, the Mighty Jagrafess of the Holy Hadrojassic Maxarodenfoe was installed into the ceiling of Floor 500 of Satellite Five, a space station broadcasting across the empire, where it manipulated news reports and kept humanity docile, ignorant and uder its control (and presumably many other species across the empire) with the help of The Editor, a Human. Eventually, 91 years later in the year 200,000, the Ninth Doctor, Rose Tyler and Adam Mitchell visited Satellite Five and, with the help of Cathica, a Human acting as a processor for the computer system which broadcasts all the news from the satellite, destroyed the Jagrafess by directing the heat in the space station to Floor 500, causing the large, bulky Jagrafess to overheat and explode. (DW: The Long Game)

During the next century, up until the year 200,100, the Earth economy collapsed after the destruction of the Jagrafess, and the population still hadn't developed to its proper level of advancement. Also, Satellite Five had been renamed the Game Station and, instead of broadcasting news, was broadcasting game shows live across the empire, still keeping humanity docile and ignorant. (DW: Bad Wolf)