Modern stoicism is becoming increasingly popular in the world: a large number of non-fiction books are published on this topic; many videos reveal the essence of this philosophy; podcasts, articles in magazines, etc. are also dedicated to stoicism. Thus, there is a need to study Stoicism at the scientific level. The study aims to provide an in-depth examination of the history of the Stoic doctrine, in the course of which it is necessary to determine the ideological origins of the Stoic doctrine and the contribution of the Stoics to the development of philosophy. One of the study objectives is to compare the philosophy of Stoicism with other schools of thought to fully reveal the purpose of the article. Analysis, analogy, systematisation, the philosophical pluralism method, synthesis, generalisation, and comparison were used in the study. The development of the Stoic doctrine in comparison with other philosophical concepts of the ancient times was studied. As a result of the analysis of philosophical texts, it was found that Stoicism arose from Kinism and developed on a par with this doctrine. Stoic philosophers had an important influence on philosophy by creating a system of dividing the world into three parts. The Stoics are the continuators of Socrates’ philosophy, and the pedagogical ideas of Stoicism are similar to the general ideas of that time. Stoicism is closely related to Epicureanism, and the Stoics also developed their method of self-analysis. The general trends in the development of this philosophy preserve ancient traditions. Stoicism, as a philosophical trend, developed over a long period and managed to preserve its basic principles unchanged. The study has created several scientific hypotheses that can be considered further at the scientific level, in particular, the following topics: the relationship between Stoicism and Epicureanism; pedagogical ideas of the Stoics; the Stoic method of introspection require further in-depth research by scholars. Such hypotheses can be useful for various groups of people interested in the philosophy of Stoicism and its application in the modern world and life, such as academics (philosophers, researchers), psychologists, managers, and ordinary people seeking personal development and a better understanding of themselves