In economics, scarcity refers to the basic fact of life that there exists only a finite amount of human and nonhuman resources which the best technical knowledge is capable of using to produce only limited maximum amounts of each economic good. If the conditions of scarcity did not exist and an "infinite amount of every good could be produced or human wants fully satisfied ... there would be no economic goods, i.e. goods that are relatively scarce..." Scarcity is the limited availability of a commodity, which may be in demand in the market or by the commons. Scarcity also includes an individual's lack of resources to buy commodities. The opposite of scarcity is abundance. Scarcity plays a key role in economic theory, and it is essential for a "proper definition of economics itself".
"The best example is perhaps Walras' definition of social wealth, i.e., economic goods. 'By social wealth', says Walras, 'I mean all things, material or immaterial (it does not matter which in this context), that are scarce, that is to say, on the one hand, useful to us and, on the other hand, only available to us in limited quantity'." British economist Lionel Robbins is famous for his definition of economics which uses scarcity: "Economics is the science which studies human behaviour as a relationship between ends and scarce means which have alternative uses." Economic theory views absolute and relative scarcity as distinct concepts and is "quick in emphasizing that it is relative scarcity that defines economics." Current economic theory is derived in large part from the concept of relative scarcity which "states that goods are scarce because there are not enough resources to produce all the goods that people want to consume".
Concept Economic scarcity as defined by Samuelson in Economics, a "canonical textbook" of mainstream economic thought "refers to the basic fact of life that there exists only a finite amount of human and nonhuman resources which the best technical knowledge is capable of using to produce only limited maximum amounts of each economic good ... (outlined in the production possibility curve (PPC))." If the conditions of scarcity did not exist and an "infinite amount of every good could be produced or human wants fully satisfied ... there would be no economic goods, i.e. goods that are relatively scarce..." This economic scarcity is not solely due to resource limits, but a consequence of human activity or social provisioning. There are two types of scarcity, relative and absolute scarcity.
Malthus and absolute scarcity Thomas Robert Malthus laid "the theoretical foundation of the conventional wisdom that has dominated the debate, both scientifically and ideologically, on global hunger and famines for almost two centuries." In his 1798 book An Essay on the Principle of Population, Malthus observed that an increase in a nation's food production improved the well-being of the populace, but the improvement was temporary because it led to population growth, which in turn restored the original per capita production level. In other words, humans had a propensity to utilize abundance for population growth rather than for maintaining a high standard of living, a view that has become known as the "Malthusian trap" or the "Malthusian spectre". Populations had a tendency to grow until the lower class suffered hardship, want and greater susceptibility to famine and disease, a view that is sometimes referred to as a Malthusian catastrophe. Malthus wrote in opposition to the popular view in 18th-century Europe that saw society as improving and in principle as perfectible. Malthusianism is the idea that population growth is potentially exponential while the growth of the food supply or other resources is linear, which eventually reduces living standards to the point of triggering a population die off. It derives from the political and economic thought of Malthus, as laid out in his 1798 writings, An Essay on the Principle of Population. Malthus believed there were two types of ever-present "checks" that are continuously at work, limiting population growth based on food supply at any given time:
preventive checks, such as moral restraints or legislative action — for example the choice by a private citizen to engage in abstinence and delay marriage until their finances become balanced, or restriction of legal marriage or parenting rights for persons deemed "deficient" or "unfit" by the government. positive checks, such as disease, starvation, and war, which lead to high rates of premature death — resulting in what is termed a Malthusian catastrophe. The adjacent diagram depicts the abstract point at which such an event would occur, in terms of the existing population and food supply: when the population reaches or exceeds the capacity of the shared supply, positive checks are forced to occur, restoring balance. (In reality, the situation would be significantly more nuanced due to complex regional and individual disparities around access to food, water, and other resources.) Positive checks by their nature are more "extreme and involuntary by nature". Daoud argues that
(T)he strong drive for reproduction in relation to the weak expansion of food production possibilities will very rapidly result in a situation of scarcity and thus hunger. This fundamental relation between food requirements and the food production capacity is the ultimate check on population growth. -Daoud, 2010 There are two types of scarcity implicit in Malthusianism, namely scarcity of foods or "requirements" and objects that provide direct satisfaction of these food needs or "available quantities". These are absolute in nature and define economic concepts of scarcity, abundance, and sufficiency as follows:
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