An 18th-century philosopher whose ideas that reason serves the passions are supported by Haidt, albeit with a nuanced view on the role of reason.

A psychologist whose six-step moral development process is embraced by liberals but critiqued by Haidt for not accounting for the full spectrum of moral foundations.

A student of Kohlberg, known for his work that emphasizes harm prevention as a core of moral rules, which Haidt finds too focused on liberal morality.

A psychological anthropologist whose findings support Haidt's concept that morality is culturally diverse, contrasting with Turiel's universalist views.

A historical figure whose ideas on the division of emotion and reason align with a balanced perspective, influencing Haidt’s exploration of morality.

A biologist who argues that emotions are genetically programmed and rationalization follows, which Haidt uses to support his ideas about moral intuition.

A neuroscientist who, through his research on emotional impairment, demonstrates the necessity of emotions for rational decision-making.

A public policy professor whose ideas on cognition and instant judgment followed by reasoning underpin Haidt’s metaphor of the elephant and the rider.

An author known for his insights into social persuasion, which Haidt appreciates for highlighting the importance of respect and warmth in communication.

A 19th-century philosopher celebrated by Haidt for his balanced approach, emphasizing the blend of stability and reform in a healthy political system.

A third-century Persian prophet whose ideas of cosmic good and evil are referenced by Haidt in discussing polarized moral views in modern debates.