A dozen years ago Norval Glenn, a sociologist at the University of Texas, wrote an important review of the leading sociology textbooks covering family life. He found that they tended to downplay children and marriage, and play up the more unusual kinds of family life. Many were openly ideological.
Glenn has just written a follow-up essay in Academic Questions. The good news is that marriage gets more play. He thinks this is due to the influence of Linda Waite and Maggie Gallagher's The Case for Marriage, which I have written about often. The bad news is that marriage and children still do not have the central place in family sociology textbooks that they have in actual societies.