Those in 'foreign' categories mainly deal with indigenous peoples on whom they may impose a totally new moral code to which tribespeople find it very difficult to adapt. Often missionaries tell the people that their customs are primitive and barbaric, and use education and comparison with western ways to embarrass the young people into disowning their cultural values and practices. But having done so, native peoples may find themselves dependent on 'Western' economic and social structures. Because they are inadequately educated and discriminated against on an ethnic basis; and because they have little experience in market economic structures, this dependence renders them easy prey to exploitation, poverty, disease, malnutrition and death.