I own 2 passports, but they're not that geographically or politically diversified.

The Nomad Capitalist YouTube channel recommends getting a second passport in a country that's not aligned without your first. For example, if your first passport is from a Western country, for your second one you may want to get one from somewhere like Georgia, Singapore or Colombia.

Some European countries outside of the EU, like Serbia and Montenegro, are also highly valued, as the location gives you easy access to all of Europe, but shields you from its leftism / statism, and stupid laws are not enforced so strongly there even if present.