From the review:

[According to Henrich, Westerners] exhibit a far greater "neurological and psychological" set of capacities for:

• trust, fairness, honesty, and cooperation with anonymous others

• patience and self control

• time drift and hard work

• reduced in-group nepotism

• free will and the capacity to make its own decisions

• analytical over holistic thinking

• impartial principles and objectivity

• original and nonconformist thinking?

[Snip...]

Here is the gist of his thesis: the uniqueness of the West, its attachment to the rule of law, its representative institutions, its scientific predilection for drawing distinct categories and assigning objects with properties to account for their behavior, its intense attachment to the rights of individuals, are products of the unique ways in which the brains of whites came to be wired in the High Middle Ages. It was not that whites were accultured to think in a WEIRD way after they created modern liberal institutions; it was, rather, that they first began to think weirdly when the Catholic Church destroyed their kin-based organizations, their extended families, clans and lineages, and prohibited cousin marriages and polygynous marriages, in favor of nuclear monogamous families. [Cont...]

This explains why immigration is such a threat; it destroys the high trust societies that Europeans have formed that benefit their particular way of thinking and operating, while simultaneously opening them to abuse by low trust, clannish, and nepotistic groups.

The comments section in below the original article is also worth reading.