If you were listening reasonably carefully to last Wednesday’s Republican presidential candidate debate, you heard Rick Santorum say, “Charles Murray just wrote a book about this.”

The question was about Santorum’s remarks on contraception, but his answer addressed the broader issue of “the increasing number of children being born out of wedlock in America.” That is indeed one of the subjects — but only one — of Murray’s new book, Coming Apart: The State of White America, 1960 to 2010.

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