To expand on Mike's definition, to give a more general one; there is a term used when talking about populations, be it biology or whatever, called a "carrying point". A carrying point is the point where adding another member to a population exceeds the ability of the area to provide adequate amounts of the most scarce resource in an area to all members of a population. This counts for mice as well as men. Mice population in nature have their populations set by the carrying point of the area and their needs. If birth rate exceeds the carrying point of the area, they will become overpopulated and the combination of lack of food, ease of predators catching them and increased incidence of disease due to increased population density will cause a die-off until they are safely under the carrying point again.Serafine666 wrote:Out of curiosity, at one point does the population cross into the "overpopulation" threshold? What determines whether there are too many people?
Men circumvent this with economics, by centralizing and transporting resources. This allows areas to have a large population which the area itself can't remotely support. Thus, you can define overpopulation as when people inhabit an area to such a degree that the carrying point is a dot on the horizon behind them and the population suffers extreme scarcity of resources because of it. If you cut all strings to an area, you get starvation, war and disease like the mice above under there are alot less people in the area. A great many wars, some would argue all of them actually, are the result of population pressure.