&quot;More than 90 percent of the entrepreneurs came from middle-class or upper-lower-class backgrounds&quot;<p>I&#x27;d like to offer a potential explanation of this:  Middle and upper-lower-class individuals have the most to gain by doing things on their own.<p>*  An upper-lower-class or middle class child will not have the same burdens and problems as a lower-class individual as describes in this post.  They likely have just enough of a support system to be able to make it on their own.<p>*  An upper-lower-class or middle class child will NOT be able to get into a great college with scholarships.  They will likely choose a safer route, like a cheaper state school.  This makes them less desirable to employers, so the &quot;safe&quot; route doesn&#x27;t exist.