Abstract
In the scientific article, the author reviewed psychological theories by conducting a historical analysis of the phenomenon of "happiness". It is established that the phenomenon of "happiness" in psychological science is constantly discussed in the conclusions of scientists on hedonism and eudenomism by two main scientific approaches. In addition, many factors that currently affect happiness were put forward by the American sociologist and political scientist Ronald Inglehart, basing his global values on the conclusions of research work. The research methods used were desk research, a review of scientific papers, theoretical and methodological analysis, secondary data analysis. The main information of the article consists of various theories and scientific approaches and modern research works related to the phenomenon of "happiness" in psychological science. The conclusion of the article states that the concepts of "happiness" and "well-being" are concepts that still complement each other in psychological science. We came to the conclusion that people evaluate happiness objectively and subjectively, hedonistically and eudemonistically.