The shared and historical nature of knowledge and subjectivity, claimed primarily by social constructionism, is a well-established concept in social science history. However, the critique of the causal-mechanistic model as the exclusive approach to knowledge—a central claim of the constructionist movement—echoes the philosophy of Kant. Social constructionism’s notable contribution lies in de-emphasizing experience as a knowledge source, denying the existence of an external reality, and remaining ontologically silent about changing it. These foundations seem ill-suited for building a critical social psychology as previously asserted. In stark contrast, Martín-Baró’s critical realism acknowledges an objective reality, constantly highlighting its injustices and miseries. He employs quantitative methods and uses social structures as a framework to explore human behavior’s varied forms and manifestations, acknowledging the existence of partial, socio-historically situated truths, and aiming for social change through his theoretical work.