Adlerian psychology, developed by Alfred Adler, is a holistic strength-based approach to understanding human development. Adler called his theory individual psychology to emphasize that people are indivisible and need to be understood as a whole person rather than as separate parts. This model is nonpathological in that people are understood as discouraged rather than having a disorder. It is also systemic in that it considers the social context to understand individuals and their symptoms. Adlerian psychology provides an in-depth explanation of how the personality develops as well as the guidelines and techniques for promoting change in therapy.