MOMBASA (4000 BC):
Mombasa is founded on the coast on the rocky coast of a distant land. Mombasans have not ventured north, but the outsiders that have say that nothing edible can be found for miles. The hunter-gatherers of Mombasa have only gone as far as the poorly-defined borders of the city-state, north where the lichen meets deciduous forest.
The forests are too poor quality to provide much sustenance for the Mombasans. The hunters may return every week with a hare or wolf cub, but never anything of much weight or value. The forest is too cold in the winter and too rich in nitrogen in the summer to harbor a growing animal community.
(the above spoiler was what I wrote before I checked the Civ game and realized that the forest patterns did not line up and it rendered Mombasa to be more on the coast. I had to rewrite.)
Mombasa sits on the shore of the land, facing south towards the calmer coasts. A series of hills and outcrops keep the western wind from hitting Mombasa straight in the face, which would've lowered the temperature of the community to unsurvivable conditions. Instead, villagers of Mombasa keep large fires going in the complex cave network below the cold plains. Though the mining abilities of Mombasa are still primitive, Mombasans were able to wrap small cave pockets in dried tallgrass and live a comfortable life. Mombasans collect driftwood from the coast and burn it, lighting the fires great greens and yellows, which are thought to be spirits, but are actually burning sea salt (this ocean has strange salts and minerals in it).
Mombasans hunt the cave-bears and ghostly creatures of the caves, but most of their food comes from the ocean. Trained divers jump from the coast down into the dark waters, emerging with as many crabs as they can carry. They usually snap and try to escape, so these divers (mostly women) bring rope bags to throw the crabs into. They've also learned ways to avoid the crabs, and have been taught to sense movement.
Life in Mombasa is slow, the winters are tough and the land seems barren, save for the berry bushes above Mombasa. In the early autumn, families leave for the east, harvesting the plentiful bushes of cranberries, cloudberries, and blackberries (the resource that spawned was wine, I edited wine into berries (that will eventually become wine)). The fruit is one of the only things that get the Mombasans through the winter, that and the abundance of shellfish and inba (white root vegetable, comparable to a potato, but sour).
Mombasa does have a serious problem, however. The source of freshwater Mombasa once had has past, forcing the people of the community to find other ways of purification. There are underground sources, flowing into the sea, but they are not as pure as needed. The Mombasans, pressed for options, add apside (a naturally forming crystal, found deep in the caves) into the water. Crushed and added to the water, apside does remove all pathogens, but it has begun to take hold on the community. Apside damages the throat as it goes down, turning people mute as the apside clogs their vocal chords. Most of the population is not mute, but the apside has still had an effect on the vocal cords, rendering much of speech impossible. Language has grown in accordance, a mixture of pre-apside words and sounds that only apside victims can make (mostly clicks and cawing-like sounds).
Okay I dunno where I'm really going with this. I'll leave this hear as a template I guess. Uuh, yeah. Not my best work, I'll probably revise is as I go one. This totally isn't realistic, I'm sure Dev is gonna shoot holes in this immediately. I barely did research though, I'm cool with any criticism.