Harith al-Muhasibi was the first one to write about moral psychology.

Nichols's current research projects are in experimental philosophy, moral psychology, cultural evolution, free will, and the self.

His work has largely focused on liberalism, perfectionism, and issues in moral psychology.

In the history of moral psychology, there is perhaps no more central figure than Lawrence Kohlberg.

She is an expert in the field of moral psychology, and her research focuses on issues associated with resistance to authority.

He is most noted for his work on practical reason, moral psychology, and meta-ethics.

Her research interests are in free will, moral responsibility, and moral psychology.

James Rest was and continues to be an integral figure in the field of moral psychology.

His efforts spawned the modern field of moral psychology.

In modern moral psychology, morality is considered to change through personal development.