I also think people could benefit from reading his work. I've yet to read an accurate word about conservatives written by a liberal on this forum, but Haidt, who is liberal, is extremely accurate. He knows things.
Regarding the moral foundations, left-liberals are shown to value
care (aiding those in trouble and nurturing) and
fairness (economic and social justice), and less loyalty, authority, and sanctity. Haidt says that while liberalism has always been around in this sense, western civilization has fostered this narrow foundation to an unprecedented extent... in his words, literally WEIRD: Western, Educated, Industrialized, Rich, Democratic.
The liberty foundation was spun-off at a later time in Haidt's project. This foundation draws the essential distinction between liberals and libertarians, who do not agree with the social obligations implied by care and fairness and generally detest liberals. They are also a distinctive western development.
Conservatives are shown to value all the foundations equally. Regarding the conservative foundations, they can seem irrational to liberals. One needs to consider evolution and the enduring strength a balanced moral foundation can impart to a society. Haidt argues that, in the wake of Nazism, group-level selection has been wrongfully discarded from evolutionary theory. He argues that evolution has, in all likelihood,
sped up during the course of human history. There is intense feedback between things like nations, religion, and technology, with DNA.
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