The head coach of the football team is not very popular with his players. They think he is mean, but do what he tells them because they want to earn more playing time and avoid being cut from the team. By contrast, while the assistant coach has little influence over playing time and team membership, the players are eager to do what he asks because of his cheerful personality. In this example, the assistant coach primarily relies on power.

There is lots of evidence

It is meant that like tapestry scientific theories often need to pull out since they are not relevant and often times the whole chain of theories may be pulled out.   

Americans often speak of their country as one of several large regions.  these regions are cultural units rather than governmental units --  formed by history and geography and shaped by the economics, literature and folkways that all the parts of a region share. what makes one region different from another? a region's multicultural heritage as well as distinct demographic characteristics like age and occupation make regions different and special. within several regions, language is used differently and there are strong dialects. there are also differences in outlook and attitude based on geography.