Books I read a decade ago in political science classes and couldn&#x27;t remember who did the studies or proposed the theories. <a href="http:&#x2F;&#x2F;www.brill.com&#x2F;middle-class-and-democracy-socio-historical-perspective" rel="nofollow">http:&#x2F;&#x2F;www.brill.com&#x2F;middle-class-and-democracy-socio-histor...</a> looks like it might discuss the topic, but I don&#x27;t know what perspective it takes