Morality evolves in two steps, from selfish reciprocity to intrinsic fairness.

Evidence

Step 1: Partner choice favors individuals who share equally the costs and benefits of cooperative interactions (see sect. 2.1.4). At the psychological level, mutually advantageous reciprocity is motivated by selfish reasons and Machiavellian calculus. … Step 2: Competition among cooperative partners leads to the selection of a disposition to be intrinsically motivated to be fair (as discussed in this section). At the psychological level, mutually advantageous reciprocity is motivated by a genuine concern for fairness. — Nicolas Baumard, A mutualistic approach to morality, 73

Categorization

  • SEED: Essay angle: the fumi-e ceremony targets exactly Step-1 vs Step-2 psychology — cheap observable apostasy destroys the partner-choice signal at step 2, not just the cooperation at step 1.
  • XREF: connects to: Morality evolved because fair partners were preferred in cooperative interactions — Nicolas Baumard, A mutualistic approach to morality: The…, 4; Moral fairness may itself have been shaped by natural selection. — Nicolas Baumard, A mutualistic approach to morality: The…, 12; Cooperation and morality are distinct categories. — Nicolas Baumard, A mutualistic approach to morality: The…, 15 (+6 more)

Broader Connections