The Diathesis-Stress model is an important psychological framework that explains how mental health disorders and psychological well-being result from the interaction between an individual's vulnerability and environmental stressors. In Applied Positive Psychology, this model helps in understanding not only the development of psychological disorders but also the role of protective factors, strengths, and resilience in preventing illness and promoting flourishing. The term "diathesis" refers to a predisposition or vulnerability that makes an individual more likely to develop a psychological disorder. This vulnerability may be biological, genetic, psychological, cognitive, or social in nature. For example, a person may inherit genes associated with depression, possess a pessimistic thinking style, or have experienced adverse childhood experiences that increase susceptibility to mental health problems. However, having a diathesis alone does not necessarily result in illness. It only increases the likelihood that psychological difficulties may develop under certain conditions. The "stress" component refers to external or internal life events that challenge an individual's ability to cope. These stressors may include academic pressure, financial problems, relationship conflicts, unemployment, chronic illness, traumatic experiences, or significant life changes. Stress varies in intensity, duration, and frequency. Some individuals experience temporary stress that can be managed effectively, while others encounter chronic stress that significantly affects their psychological functioning. According to the Diathesis-Stress model, psychological disorders emerge when environmental stress