desire to grow the population of the group. The growth of population results in the loss of person to person interaction which creates a need for a system to keep track the interaction between the leads of the group. The groups would then create symbols of either language, clothing or ideology to identify who belongs to the group and where are their position in the society. The process of identifying the who resides in the groups also expands to identifying the power structure of the group. The identification of the power structure within the group is commonly distributed as a hierarchical power structure meaning groups are organized with one head of the group overseeing the whole group. The group will eventually grow to a state in which labor is divided within specializations meaning that there are branches in the society that are in charge in military affairs, laws, or religion of said society, the elites of the society occupied the leading positions in the branches. Linear development of traditional complex civilizations These represent the four conventional stages of how civilizations are usually understood to form. Mobile hunter-gatherer (bands) Hunter-gatherer culture developed among the early prehistoric era. Evidence traces them as far back as 2 million years ago. As primarily nomadic groups, they valued the idea of kinship; moreover, these kinship focused groups recognized status via age as they viewed their elders as the wise ones from the group. Consequently, they discovered the use of fire and developed intricate lithic tools for hunting. These early humans showcase the early beginnings of both social and biological evolution ideals. They were egalitarian by nature, hunting enough food and shelter, while the division of labor was predominantly gender-based with the advancement of hunting. Additionally, the domestication of animals and plants sparked the Neolithic Revolution. The transition was slow-forth as more developed societies began to develop more effective agricultural methods to meet their needs. This complexity fueled growth in the early civilization of Mesopotamia. Sedentary societies (tribes) Sedentary societies or more commonly known as tribes, are rarely more than a few thousand individuals who are settlers. They've adapted agricultural innovation, by focusing on horticulture and the domestication of plants & animals. As they derived Neolithic roots of being kinship focused and respecting their elders and the knowledge they have due to their age. As early Mesopotamia was developing, the Ubaid Culture started off as one