To keep people in their lower ranks of hierarchies, fear and unquestioned loyalty are essential. Recent research shows a link between these two elements and political conservatives including the Republicans - the ones who are most actively supporting hierarchies.
Researchers have found that children whose parents believed that children "should always obey their parents," and people whose parents described them as being fearful and cautious were likely to vote conservative/Republican. Children whose parents believed that "children should be allowed to disagree with their parents" and who were active and restless as young children tended to prefer Democratic party policies later on.
Authoritarian attitudes and fearful temperaments produce conservatives who in turn produce hierarchies. Looks like it is a simple and predictable path.
http://www.psychologicalscience.org/index.php/news/releases/parenting-and-temperament-in-childhood-predict-later-political-ideology.html
