100.000 years ago, a cold streak of the climate, which threw much of the Northern Hemisphere into a glacial age, had the effect of drying out much of Africa and destroy much of the tropical rainforest around the Congo River, turning its lower river into ripe land for agricultural development. Bereft of their natural environment, the rainforest hunter gatherer peoples, the short-stature multitude of nations we would call 'pigmies', would learn to cultivate the native yams of the region, creating the first agricultural complex in the world and, with it, its first civilization, born on the shores of the great Mother River and supplied by massive river trade that would flourish for millennia afterwards.
This magnificent civilization, worshipping their Mother River, the stingless bees which they cultivated for honey and, with time, learning to read from the skies astrological data, would find in the line of the equator a meaningful omen, to which they'd dedicate much worship in the form of building their massive pyramids and temple complexes, the region becoming renowned for its holiness among those people. Their feats of engineering would be unmatched by any contemporaneous peoples, to whom the Congo-River civilizations would deride eternally as 'giants', brutish and unkept people useful for manual labor, intelligent cattle in all but name. Against their mighty armies was born the intelligent and organized expertise of civilized warfare, which would quickly turn the assaults on 'pygmy' settlements by 'giant' nomads on the opposite - expeditions to capture slaves from among the proud nomadic tribes.
This would set the stage for the expansion, somewhat commercial, somewhat martial, of agrarian society to the regions of the North, where the river is suddenly rendered unnavigable by the great waterfalls there. That natural stopping point for civilization grew to become important markets with the motherland in the lower river, end nodes to a trade that then went to other rivers, where there existed mines for gold, which became a prize possession of the region, greatly enriching it in a manner that, ultimately, would have it compete with the low-river economy. This competition would be heralded by the rise of a palatial economy, led by priest-kings of various cities, who legitimized their rule by building new pyramids, in the place where the equator crossed the river for a second time, expanding upstream beyond the falls to reach those lands. That would eventually lead to further upstream exploration and city-building.
The discovery of vast metal deposits in the upper river to the south, with vast sources of, among other things, copper, tin and cobalt, led to a massive economic surge in the region, one that would be accompanied by a military innovation - copper and later bronze weapons. Although copper had already been dabbled with in the north, mostly for ceremonial purposes, it was in the south that the bronze alloy and its properties were discovered, growing into an important societal factor that saw many old orders, including the pyramid-building priestly classes, overthrown. This societal change, heralding from upstream and slowly consuming its way up to the mouth of the river, would open a new chapter of the history of the earliest civilization, as a force mightier than anything the world had seen sailed down the river, conquering everything on its way...
But that's a story for another time in the long, long history of the peoples of Mother Congo.
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So, this scenario is inspired by one of my favorite TLs in the forum,
Empire of a Hundred Millennia: a Congo River Civilization TL. The basic premise there is malaria going extinct in early hominid history, leading to a much greater growth of human populations, especially in Africa, and allow the continent to develop quite sooner. It's a shame the TL is so short, but the basic idea is something that has fascinated me since I found it in my early days lurking here. So when this challenge came up, I decided to take it and finally do something about this.
In a turn of events I somewhat regret, I decided to really go to the effort and try to conjure up a language for these people, inspired by the languages spoken in the region by the "pygmy" peoples. It's actually a fascinating topic, but, shockingly I know, not one for two or three weeks of reading while studying for exam season. Anyway, I was able to conjure up a mock-language to fulfill a few words required, which is where we get the city names.
In any case, although it's great to be able to finally do something about this scenario, this is clearly not enough, and be warned that I will indeed do more about this idea (actually, the whole unification prospect at the end left me curious, I might just do a Congo Empire to see how it feels)
What else... oh, although I'm not sure it's visible or remarkable, I used this map as an opportunity to test blurriness in maps, I used it in the seas to give a sensation of depth and in the various regions to give an idea of it being more of an informal border than an actual polity. I don't know how well that was conveyed, but still
Anyway, hope you like this idea, and you can expect to hear more from these fascinating peoples