> Yet, I have no idea what that root cause could be. Any ideas?

I don't know, and haven't read anything remotely convincing yet. Accounts based on individual psychology (cognitive biases etc) don't do the job, as this form of irrationalism is peculiarly concentrated in parts of the Anglosphere (notably the US, Australia, and the UK). An explanation can only emerge from the domain of history and/or culture: what has made these regions so distinctly dysfunctional?