<p>There are scholars who study this subject and they conduct research and publish them in scholarly journals.</p>
<p>As we are all (presumably) advocates of college and graduate education and learning from scholars, the best approach would be to read some of the scholarly literature. Get on a college library web site and search the scholarly literature or call someone at a local university who is an expert in the area. Otherwise, you can spout theories all day long and not get anywhere.</p>