Haidt on the five foundations of morality

Here is a video where Jonathan Haidt talks about the five foundations of morality,

  1. harm/care,
  2. fairness/reciprocity,
  3. ingroup/loyalty,
  4. authority/respect,
  5. purity/sanctity

He makes the point that political liberals (in the American sense) have moral intuitions primarily based upon the first two foundations, and therefore misunderstand the moral motivations of political conservatives, who generally rely upon all five foundations (see also here).

But why exactly five and only five foundations? Any proof that there couldn’t be more?


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