Individualistic culture is a society which is characterized by individualism, which is the prioritization or emphasis of the individual over the entire group. Agency. The belief that people have the power to define their life such that they aren't victims of circumstance, society, history or culture.
The first people to do so were the Akkadian's king Sargon (reigned 2334–2284 BCE). He conquered the cities of Sumer and brought them under one system of government.