History was a driving force behind such migration, since humans tended to move to new territory when they lacked food, shelter, or other resources--meaning that most of the conflicts throughout history have been driven by the same forces that drove migration out of Africa.
True, it actually is higher.
In reference, <span>The Encyclopædia Britannica defines "political machine" as, "in U.S. politics, a party organization, headed by a single boss or small autocratic group, that commands enough votes to maintain political and administrative control of a city, county, or state".</span>
<span>SO: It's purpose primarily serves to gain and maintain political and administrative control of city/county/state, none the less the population.</span>
What time period? maybe with a little more info I can help you
