Denialism is a deviation from the mental logic system. It is fundamentally the systematic application of sentimentality, about what you want.
Basically when a person is informed, for example, that a food is unhealthy, but that individual wants to eat, then he looks for possible positions to justify what he wants, even if it lacks logic.
The willingness to accept the flat earth, for example, seeks to be based on ancient information, which is the cosmological view of the Babylonian and Egyptian peoples, from more than 4000 years ago, and seeks to ignore the years of scientific research and knowledge tested and proven in laboratory.
Both examples clearly show the deviation of the mental logical system, to the foundation of personal will, over logic.
And it is simply that, denialism is the decision to opt for the improbable system and contrary to the system based on scientific empiricism.
A denial individual is normally based on being raised in a family that does not base its concepts on science. These are families normally linked to systems of fun and pleasure, seeking as little scientific knowledge as possible.
There is a big difference between learning to work in a profession, and enjoying learning to understand things. A professional can be a denial, because learning his profession was not to understand the things around it, but to get things from it.
Those who are not deniers do not have a knowledge bias, but test each position and see which one has a practical and proven foundation. It is based on proof.
When we look at Conspiracy Theory, we see the foundation of opinion concepts, not proven practical foundations. And any proven practical foundation that goes against conspiracy theory is defined by conspiracy theory followers as high-tech deceptions that look like the truth.
In the final line of denial, everything that is contrary to opinion, however logical and proven, is considered false. And every scientific foundation is regarded as mere opinion.
So in a family where science is considered important, and children are educated about the workings of nature, and the foundation of the universe. A home where parents' decisions are based on logic, and the best choice in the naturalistic concept. This home educates natural logic.
The more irrational in the naturalist system is the decision of educators, the more directed towards denial is found the student.
Thus, the worldwide concentration of denial individuals is the result of the teaching of educators about the world's students.