Fundamentalist churches, schools, and families do not provide information about other belief systems and usually discourage members from reading widely. In very conservative groups, college education is frowned upon. Christian groups are known for banning books and objecting to certain curricula, such as the teaching of evolution. Clearly there is a fear that too much outside information will threaten faith, so it should be controlled. Children grow up thinking that what they have been taught is all there is. If you control the information people receive, you restrict their ability to think.
control of information = control of thought
