There had been a great and secret project that had consumed a part of the western world in the 2030's. Okay, technically two great projects, but one was pretty much just a rehashing of the Final Solution. In the less violent of these projects, technology was researched, projects undertaken that were massive in scale. It took years for everything to be arranged, for all the plans and contingences to be in place, even as they suffered loss after loss, punishing blow after punishing blow in the public sphere. But then, even as the horns and drums resounded for a Gender War...
The vast majority of men seemingly vanished over a weekend, dropping out of the public sphere were they were not welcome... and out of the private ones, where all the jobs that needed to be done to actually keep things running happened to be. Needless to say, most of the powers that be did not even know those men existed in the first place, but they noticed when all the visible and attractive men? When all the rich men that had so far escaped with their assets intact? Those prime hunting targets had vanished, and drew the near immediate eye of every woman, as the OTHER great plan was being launched.
Except, there were no men to enact a Final Solution on. No patriarchy to overthrow, not a single male oppressor to be found! It was, as the New Order Matriarchs said, rather vexing. But now it was time to undo all the damage men had caused, roared the Amazon Superiority Sisterhood declared. First with fixing the environment and making sure that everyone like, lived in harmony with the earth according to their star signs cheered on the Gaiain Collectivist Front. Nien chanted the Transformative Social Justicars, the first order of business is to purge any ideological dissents that could lead to a return of men, starting with the TERFS!
The Blessed Sisters of the Divine Mother Goddess prayed for a resolution, while the New Dawn Revolutionary Guard announced that the only way forward was to destroy all the was of Man's World, so a feminine utopia can rise from the ashes! A thousand factions rose up, each declaring that they had the true vision of the future, while all the others were ignorant bitches who were likely plotting with the men! Before long, cities began to burn, blood began to flow and violence reigned surpreme.
All the while, as they looked on from their secure bunkers, the elite who had expected to rule watched their kingdom tear itself apart, the slave class they planned in breaking in nowhere to be found and the radical extremists that they had planned to be among the first to die in the Gender War, necessary sacrifices to bleed the males dry and rid themselves of the ideologies they used to control the masses? They were taking power and carving out realms for themselves, ruining all their work!
Silently, they seethed, because this was the men's fault for ruining their plans! The men were supposed to be there to die and be enslaved, and instead they were nowhere to be seen! It was a disaster!
Meanwhile, underground on Mars, in vast underground caverns that were transformed to resemble the surface of Earth... men sighed in relief, as they enjoyed the peace and quiet, the tranquility only broken by the sports teams and friendly contests. All in all, they had finally given the women exactly what they said they wanted... a world without men. And to a man, even as eyes were on the life like robotic companions, they wished the women well, because they were never going back!