As part of the resurgence of interest in personality development, we wrote several theoretical pieces outlining the Neo-Socioanalytic Model of Personality Development. In this chapter, we clarify why we developed this framework and how it differs from other personality frameworks. We also discuss how well components of the framework, such as the principles of personality development, have held up over time. We conclude with recommendations on improving the model and for future research to better test predictions from the model.