Human NatureHuman nature, its essence, origin and realization have long been controversial issues involving heated discussions. Nowadays there is also a plurality of theories and opinions regarding this concept. The purpose of this article is to analyze different theories of human nature, as well as provide an eclectic reasoned conclusion on what constitutes this concept and what characteristics it includes. Jean-Paul Sartre considers human nature as potentially free. Furthermore, he affirmed the idea of ​​“nothingness” as a central concept in this discussion highlighting the multitude of possibilities. It is important to clarify that Sartre's "nothingness" is not a void, on the contrary, the idea is indefiniteness, incompleteness, infinity. It means that a person is constantly faced with a series of choices and in them reveals his or her nature, both positive and negative (Kupperman, 2010:155). Although the philosopher's theory is not associated with determinism, Sartre appears rather fatalistic in stating that it is impossible to escape freedom, but at the same time he means that a person is completely unpredictable in his behavior. However, Sartre also indicates some human preferences that often predetermine the respective choices, and therefore also states that human behavior can often be predictable. However, there is a point at which a person can make the so-called "existential choice", which is made sensibly and intentionally by a person in certain circumstances. In stating this, it is clear that Sartre completely rejects the element of unconscious influence on the choices people make. To understand Sartre's vision of human identity, it is reasonable to explain his statements... in the middle of the paper... he needs to recognize and find harmony between body, mind and soul; the essence of human life; the definition and role of immorality and dignity, etc. in which human nature is revealed. Research in this area would be able not only to expand the boundaries of contemporary understanding of the concept of human nature, but to reveal new opportunities for the development of its constructive representations, or the alteration of destructive ones.Works CitedDear, AD Grounding the Nietzsche Rhetoric of the Earth. Walter de Gruyter, 2004.Hobbes, T. A Treatise on Human Nature and that on Liberty and Necessity, 1812.Kline, T. C. Virtue, Nature, and Moral Agency in the Xunzi, 2000.Kupperman, J. Joel. Theories of human nature. Hackett Publishing, 2010. Nietzsche, F. W. Human, All Too Human I: A Book for Free Spirits. Stanford University Press, 2000.