Moral psychology and moral discourse

Moral psychology investigates how humans make moral judgments, form moral beliefs, and are persuaded by moral arguments. A key insight is that morality is not purely rational: emotion, intuition, and social context shape moral judgment.

Core concepts:

Moral emotions — Emotions closely tied to moral evaluation such as anger (in response to injustice), disgust (moral transgression), shame (personal failure), and contempt (vice). Moral emotions are associated with moral judgments and are often "contagious"—they spread through social networks and influence others' evaluations.

Moral frames — How an issue is framed as a moral problem (vs. a pragmatic, economic, or technical problem) determines which emotions and values are activated and how persuasive an argument becomes. Moral framing is more effective in driving behavioral change and information sharing than non-moral framing.

Social influence on morality — Moral beliefs and judgments are shaped by the social groups to which we belong. Individuals develop similar moral intuitions to others in their networks, a phenomenon called "moral contagion" when framed in social-transmission terms.

Key papers

• Brady et al. (2017) — Emotion shapes the diffusion of moralized content: demonstrates moral-emotional language is key for the social transmission of moral and political ideas; shows moral contagion effects specifically (not just basic emotional contagion) explain message virality.

Connections

• Emotional language in online discourse — how moral sentiments are expressed linguistically
• Information diffusion in social networks — moral-emotional content spreads via social networks
• Political polarization and ideological echo chambers — moral framing and in-group/out-group moral judgments drive polarization