Sentence:  The fact that he has cast over those materials the light of a skeptical mind does not make him any the less Southern , I rather think , for the South has been no more solid than other regions except in the political and <WSD>related</WSD> areas where patronage and force and intimidation and fear may produce a surface uniformity . 
Meaning of the word marked with <WSD> tags:  being connected either logically or causally or by shared characteristics