Humans are the fundamental core of the world, and the world's concern for them is essential to ensuring their psychological, social, and economic stability. They are the focus of development and progress. Therefore, everything that interacts with them must be directed toward achieving their interests and well-being. In the past, humans were considered the link connecting producers to consumers. However, in recent times, problems and challenges have begun to intensify, forcing them to move away from their former position with the advancement of technology and the development of machines, which have replaced humans in many fields and rendered them unable to work, becoming a number in a form of unemployment. This study emphasizes the importance of studying alienation under the capitalist system, where workers lose their identity and suffer injustice and enslavement. The study aimed to identify alienation, its causes, and types, as well as the most important methods for reducing and treating it, strengthening social ties, and the continuous interaction between the will of a single society. The results demonstrate that alienation is a state of separation that afflicts the individual, rendering him unable to adapt to society. Alienation appears as a result of specific causes and varies and differs depending on the circumstances of its emergence......................... Keywords:.................. Alienation, labor theory, class contradiction, Marxist theory.