. . . and in fact have written about their inter-relations several times, including at length in my book. Still, that doesn’t excuse the slip up in today’s column. Discussing Sen. John Kerry’s recent turnabout on nation-building (he’s now a doubter — or at least that was his position two days ago), I opined that he criticizes the McChrystal plan as reaching “too far too fast” because, after all years of endorsing the concept, he finds himself “unable to bring himself to the conclusion that maybe nation-building in the Arab world isn’t such a great idea after all.” I meant to say “Muslim world.” Sorry about that, and thanks to the several readers who noticed.