Sentence:  Without saying or seeming to say that in portraying the Sartoris and the Compson families Faulkner 's chief <WSD>concern</WSD> is social criticism , we can say nevertheless that through those families he dramatizes his comment on the planter dynasties as they have existed since the decades before the Civil War . 
Meaning of the word marked with <WSD> tags:  something that interests you because it is important or affects you