Large families are no longer economically necessary, nor are they commonly endorsed by social norms, but certain religious faiths continue to extol large families and disapprove of using contraception to limit family size. This illustrates .

culture lag      

Explanation:

In sociology, culture lag was introduced by a sociologist named William F. Ogburn during 1922 in his word associated with social change in regards to original nature and culture. The term "culture lag"  is defined as a process that explains that a particular culture takes enough time to adjust with new "technological innovations" and therefore the social problems that occurs because of this lag.

As per the question, the given statement illustrates "culture lag".

the historians cited in the article all agree with one another about the cause of the civil war. despite coming from different backgrounds and cultures, the historians agree that slavery was the root cause of the civil war. the fact that all these historiansgenerally agree with one another makes their shared viewpoints more reliable and valid, especially because the historians have different backgrounds and all work for the well-respected institutions of howard university, clemson university, and the university of colorado.