▁the ▁Dean ' s ▁Council ▁at ▁the ▁Harvard ▁Div inity ▁School . ▁Car roll ▁is ▁a ▁Fellow ▁of ▁the ▁American ▁Academy ▁of ▁Arts ▁and ▁Sciences , ▁and ▁is ▁a ▁member ▁of ▁the ▁Academy ' s ▁Committee ▁on ▁International ▁Security ▁Studies . ▁He ▁worked ▁on ▁his ▁ 2 0 0 6 ▁history ▁of ▁the ▁Pent agon , ▁House ▁of ▁War , ▁as ▁a ▁Sch olar - in - Res idence ▁at ▁the ▁Academy . ▁Car roll ▁is ▁also ▁a ▁Dist ingu ished ▁Sch olar - in - Res idence ▁at ▁Su ff olk ▁University ▁in ▁Boston , ▁where ▁he ▁wrote ▁his ▁latest ▁book , ▁Pract icing ▁Catholic , ▁published ▁in ▁ 2 0 0 9 . ▁ ▁Const antine ' s ▁S word ▁Car roll ▁wrote ▁a ▁history ▁of ▁Christian ity , ▁specifically ▁Roman ▁Catholic ism , ▁anti - S emit ism ▁and ▁treatment ▁of ▁Jews , ▁titled ▁Const antine ' s ▁S word : ▁The ▁Church ▁and ▁the ▁Jews ▁( 2 0 0 1 ). ▁In ▁this ▁book , ▁he ▁connect s ▁many ▁personal ▁experiences , ▁especially ▁his ▁boy hood ▁tri ps ▁to ▁Catholic ▁pil gr image ▁sites ▁in ▁the ▁Rh in eland , ▁and ▁as ▁a ▁sem in arian ▁and ▁priest , ▁to ▁the ▁places ▁and ▁events ▁that ▁he ▁analy zes . ▁▁ ▁Although ▁it ▁got ▁mixed ▁reviews , ▁Const antine ' s ▁S word ▁was ▁a ▁New ▁York ▁Times ▁Best ▁S eller . ▁The ▁book ▁also ▁earned ▁Car roll ▁several ▁acc ol ades ▁from ▁national ▁newsp apers , ▁including ▁The ▁New