bye humanity
The land was barren, the sky was black after the comet hit earth. A fifth of the world population gone in a blink of an eye a biblical verse said. That was the least of the surprise. The earth cycle through the galaxy within a week time period pivoted to outside the galaxy just enough that radiation killed everything's growing. To make matters worst the earth rotation and axis put the sunlight, mainly over the ocean and land was darkened in never completed dawn sunrise that wasted away what plant life was growing. That was when the climate change that everyone had been expecting happened. The weather was a bit different. Instead of a heat wave, snow, ice, the glacier poles increased expanding and pushing the ocean up, and over the land boundaries so much of the coast was under five feet of water.
The lack of plant growth, coastal submerging under water, comet burnt earth, and the sun never showing itself might have been survivable taken in over a course of a little time. However, having all this happen within a month drove people insane for religion and asking questions about their reality. Those survivors were easy prey for that wanting money and claiming to know that which could not be known.
The oddness of these events was lost on the masses due to propaganda, which was issued during this time. People were thrown into a mass project to save humanity fleeting did they realize that the aliens had taken over the leadership that humanity had and were using them to depopulate earth.
The leaders started to starve a part of the world. No information, no media from India was not unexpected but the death toll was close 99.9 percent. For China, the aliens fought Pakistan while Pakistan actually used nuclear bombs on India to finish demolishing that society. Chinese at that time were hungry by this point and cannibalism of a whole country happened within a year. Either the Chinese ate the Pakistanis or war destroyed everything. The land still did not grow anything during this time.
That is when the aliens empowered a leader to lead earth out of the dark ages. Humanity under his leadership required being marked and subjected to his will on whether a group of people would eat or starve to death. The chips in the arms or forehead allowed for the whole human races to be enslaved. Those not wanting the chip was not given food, nor the tranquility of peace. Their minds were always on while those with the chip were given non-feeling they could murder and not feel anything.
That was the story of earth and the end for mankind. The ice age lasted a hundred years. At the end, eight billion humans were gone, and a new civilization had control of earth. Earth survived a living ecosystem performing well for the modern occupants. Never looking back or thinking of humanity just as the dinosaurs had gone so had humanity.