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Scarcity

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Scarcity is a fundamental concept in the study of economics. It refers to the gap between limited resources and theoretically limitless human wants. In our world, there is only a finite amount of human and nonhuman resources available. Even with the best technical knowledge, we can only produce limited maximum amounts of any economic good. If we could produce an infinite amount of every good, scarcity would not exist. In such a world, there would be no economic goods because every want could be fully satisfied.

Aftermath of Seattle fire of June 6, 1889, showing bread line leading to tent of Tacoma Relief Bureau (CURTIS 533)
Aftermath of Seattle fire of June 6, 1889, showing bread line leading to tent of Tacoma Relief Bureau (CURTIS 533)

Economic theory distinguishes between two main types of scarcity: absolute and relative. Absolute scarcity refers to a lack of resources in general. This often involves the scarcity of ultimate means, such as food or water. It is a condition where human requirements are greater than the available quantities of useful goods. Relative scarcity, however, is the concept that defines modern economics. This occurs when there are not enough resources to produce all the different goods that people want to consume. Even if we have enough to survive, we may still face relative scarcity when choosing between different items.

Thomas Robert Malthus was a thinker who focused on absolute scarcity. In his 1798 book, "An Essay on the Principle of Population," he studied how populations interact with food supplies. Malthus observed that improving food production could temporarily help a population. However, he believed this improvement led to population growth, which eventually restored the original production levels per person. He called this the "Malthusian trap." He argued that populations tend to grow until they reach a point of hardship, such as famine or disease.

Malthus PL en
Malthus PL en

Malthusianism suggests that population growth can be exponential, while food production grows linearly. This imbalance can lead to a "Malthusian catastrophe." Malthus identified two types of "checks" that limit population growth. Preventive checks are voluntary or legislative actions, such as choosing to delay marriage to balance finances. Positive checks are involuntary and extreme, such as war, starvation, or disease. These positive checks occur when the population exceeds the capacity of the shared food supply. They serve to restore balance by causing high rates of premature death.

Lionel Robbins, a prominent economist at the London School of Economics, focused on relative scarcity. He famously defined economics as the science studying human behavior regarding scarce means with alternative uses. Robbins argued that scarcity requires people to make choices. For a situation to involve scarcity, a person must want multiple things but lack the means to choose both. They must also be able to rank these needs in order of importance. This process of making choices based on importance is known as "economizing."

Robbins explained that every act involving scarce means and time has an economic aspect. When you use a resource to achieve one end, you must relinquish its use for another end. This creates a system of trade-offs. Because we cannot pursue all societal goals at the same time, we must decide which are most important. This necessity for choice is what drives much of human economic behavior. It is the relationship between our various ends and our limited means that creates the field of economics.

Scarcity also drives competition within a society. Competition occurs when people strive to meet specific criteria to determine who receives certain goods. One common method is the price system. If a society uses money to coordinate economic plans, members will compete to earn money to buy what they need. This helps allocate scarce resources to those willing to pay. Even items with low production costs, like air, are treated differently than items with high costs, like gold. Gold is scarce because it requires significant resources to find and process.

Aftermath of Seattle fire of June 6, 1889, showing bread line leading to tent of Tacoma Relief Bureau (CURTIS 533)
Aftermath of Seattle fire of June 6, 1889, showing bread line leading to tent of Tacoma Relief Bureau (CURTIS 533)
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