ABSTRACT
Personality change interventions (PCIs) are structured approaches that help people intentionally modify aspects of their personality in line with self-endorsed goals. This article synthesizes theoretical and empirical advances in volitional personality change and sets a research agenda for PCIs. We review core models of self-regulated personality change, summarize evidence for PCI effectiveness and putative mechanisms, and delineate methodological, ethical, and societal challenges. Priorities for future research include active-control randomized trials, multi-method outcome assessment (self, informant, behavioral), and long-term follow-ups. We argue for personalized, adaptive approaches and for broadening targets from trait levels to skills and behavioral flexibility. We also map the ethical landscape (e.g., potential harm, pressure to conform, possible exacerbation of social disparities), while outlining corresponding safeguards. The result is a framework that clarifies what can change, for whom, under which conditions, and with what downstream consequences. When designed responsibly, PCIs may foster favorable individual and collective outcomes, including adaptive functioning, well-being, and resilience in a rapidly changing world.