Most people are fairly flexible in their view of the world--and most people, in most cultures, re-interpret life on an ongoing basis, changing as the world around them changes--it is a part of the growth process--Some people, though, are so threatened by change, that they surround themselves with certainties--defining the way it should be, as opposed to the way it is--This is the extremist--always angry at the world as it is, usually enraged by some "injustice" or other, but really just unable to deal with the inevitable changes--light to dark, summer to winter, young to old,--nourished to hungry, child to adult, living to dead--

Every society has people who are like this, and, at one time or another, every person can be like this--