When men are born, their habitat is already defined. Eventually, they will adapt to it, i.e., they acquire the required consistency that will help them to overcome the obstacles that life has. This way, mankind achieves such intrinsic nature that defines a concrete existence in time and space, further arriving to a propensity to act according to its own discretion, and not in concert with the community, becoming isolated and selfish in affections, interests, studies, and other dimensions. Finally, men become full of themselves, forfeiting any other purposes.

Thus, since the VIII century, individualism constituted a topic of controversy. Several centuries later, St. Thomas Aquinas says that the principle of individualization is, in sensible things, “matter”, while for Duns Scotus it’s only a philosophical form that he calls haecceitas, i.e., this, here, and that reduce to the ultimate essential reality of each individual, i.e., particularly distinguishable from one class, collection or series, indivisible, impossible to separate in parts without altering its character, without stopping being a mere being. Therefore, at least, the individual contains two principles: its nature and its individual entity, elements that exist only by a formal distinction, not by factual reality.

The individual is a real being, unlike its species, which is ideal. The problem that creates this concept derives from the relationship essence-existence, an understanding of the nature of the singular, and so further. With this value, the problem of individualism comprises the fields of sociology, psychology, and politics, invading existentialism.

Self-centered people creates a harmful environment, which typically leads to irreversible damage. Because society has been imbued with these people’s actions, it has been steadily adapting to such individualistic behavior, which in turn leads to societies being directed by monopolies and messianic pseudo-leaders. Often, development of such societies depends on unilateral theories, normally based on confrontation, created by the diversity of characters and conceptualizations.