We’ve all come across people who just seem incapable of modifying their perspective based on new data being presented. Most of us still mouth the words that additional education (or indoctrination/propaganda as is often the case) is what is needed since surely this person will turn around if his/her consciousness is sufficiently expanded with additional data backing your perspective. However, all too often deep inside we know that some people are “hopeless”. This conclusion concerning failure of propaganda is reached from all over the political, cultural, and religious spectrum at one point or another. It thus becomes fashionable to outright dismiss “inconvertible” individuals and opposing zealots (on political and religious fringes of any given population) as nuts and crazies.
Personality theory in psychology allows us to better categorize individuals in society without resorting to name calling. Myers-Briggs typology in particular offers a better construct (compared to useless terms like conservative and liberal for example) to predict how an individual will act politically and socially. Myers-Briggs research combined with biology and brain scan techniques also offers us hints at understanding the underlining anatomical basis that predisposes a person to be either a disagreeable radical or a gentle follower.