This is the law of supply and demand.
The law of supply and demand includes two basic economic principles that describe how price changes affect the supply and demand for an asset, commodity, or product.
All else being equal, the law of demand states that demand for a specific product changes in inverse proportion to its price. In other words, as the price rises, so does the demand for the product. Cost changes for a good or service are related to the quantity supplied by the law of supply. Unlike the law of demand, the law of supply shows the relationship between two is direct rather than inverse.
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I believe your answer to this is the Nubian civilization.
Most tribes come and go/conquered or mix in
Franks successful in settling - Establish roots
Zeus is the sky and thunder god in ancient Greek religion, who rules as king of the gods of Mount Olympus. His name is cognate with the first element of his Roman equivalent Jupiter.
In most cases in a race for a position, it is a democrat versus a republican. Take the 2012 Presidential Election. The incumbent, Barack Obama, faced off against Mitt Romney. However, Gary Johnson, former governor of New Mexico, also ran. One of the reasons he didn't do so well is he wasn't a main part candidate.
