Some goods are manufactured continuously, such as electricity. Some goods become available during a short period in the year, such as wheat, and must be stored. A low level of stored goods, or stocks, makes the society vulnerable. It may reach a point of zero stock. For instance, suppose that a big meteorite or comet falls on Earth, which darkens the sky with dust and impedes harvests for two years.
Humanity is vulnerable according to the level of food it stores.
Certainly, there is a limit to the tolerable scarcity of goods. The increase of the number of individuals in an environment , which cannot support any additional people, will lead to fighting, war, famine, and thus to the potential for a drastic reduction in the number of individuals. Go back to table of terms . Tools Humans have invented tools . A tool is also called an economic good.