Overall the cause of the issue can be, in my opinion, summarized as cognitive isolation. People either never learn to or stop challenging their own views and k

Overall the cause of the issue can be, in my opinion, summarized as cognitive isolation. People either never learn to or stop challenging their own views and knowledge. This ranges from rather simple cases where people live in less advanced areas, living hard but repetitive lives, to the well-educated and experienced who stopped debating with people of the same level of mastery of some subject, thus, constantly amplifying their perception of a subject and eventually also ceasing to pick up nuanced disagreements from those who at least challenge a small part of the respective topic. The intent being, at best, to win an argument and validate one's perspective rather than letting others to convince oneself In simpler terms, many people--whether educated by well-grounded or misleading sources--do not understand or neglect that even if you have trained, studied, researched in-depth for years, you are quite rarely capable of considering and addressing enough of the relevant approaches to a certain matter and that you have to continue to "peer-review" your own points of view your whole life. Misconception of that often leading to the misinterpretation of the importance and the nuanced workings of trust in our societies which a whole new world of dangerous paths one can take.