I've got an idea: Anarcho-voidism - a newly discovered form of government that operates under the pretext of there being no people to govern. Ideally, it should eventually spread its ideals around the entire world and then keep power for a few million years or so, possibly more or less.
The main propaganda that it had available for usage is judicious use of machine guns, tanks, bombs, nuclear warheads, chemical warfare, and war in general. It is an incredibly popular government form among its many subjects and boasts absolutely no complaints from any of them. And it is unique in that conquests by it leave the populace indifferent instead of livid, making it by far the most popular form of government to be conquered by.
The government form, I belive, grows with each passing year. It already has much more than the population of this earth under its grasp, and I forsee a strictly positive outcome for it for the rest of eternity. Any citizens that come under it seem extremely unlikely to convert to any religion or migrate away from the cities that have been taken over by it anytime soon. Despite this, most people fear this form of rule for the negative connotations popular society gives it. Amusingly, over age demographics the acceptance of this government type seems to increase from a very small number to 100%, flawless "No Complaints," meaning it is the absolute most popular form of rule for almost all people aged 110 or over.
I believe this government form will have an exceptional popularity rate by the year 3000.