▁also ▁discuss es ▁the ▁phenomen on ▁of ▁private ▁entities ▁that ▁have ▁started ▁to ▁perform ▁tasks ▁she ▁describes ▁as ▁" core ▁military ▁functions ". ▁ ▁Dick inson ▁is ▁author ▁of ▁the ▁book ▁Out s our cing ▁War ▁and ▁Peace ▁( 2 0 1 1 ). ▁The ▁book ▁acknowled ges ▁that ▁priv at ization ▁of ▁the ▁military ▁is ▁" likely ▁to ▁be ▁a ▁fact ▁of ▁life ▁for ▁twenty - first ▁century ▁military ▁activity ". ▁She ▁notes ▁that ▁a ▁process ▁that ▁began ▁during ▁William ▁C oh ens ▁ten ure ▁as ▁Secretary ▁of ▁Def ense ▁was ▁significantly ▁expanded ▁under ▁Donald ▁Rum sf eld ▁and ▁his ▁successor ▁Robert ▁G ates . ▁In ▁a ▁review ▁published ▁by ▁The ▁American ▁Journal ▁of ▁International ▁Law ▁Scott ▁H orton ▁wrote ▁that ▁the ▁book ▁" stand s ▁alone ▁as ▁the ▁first ▁serious ▁eng agement " ▁of ▁the ▁private ▁security ▁contract or ▁industry ▁at ▁the ▁" level ▁of ▁law ▁and ▁legal ▁policy ". ▁Steph anie ▁G os nell ▁Hand el , ▁a ▁former ▁Marine ▁officer , ▁writes ▁that ▁Dick inson ▁focus es ▁on ▁" develop ing ▁a ▁legal , ▁regul atory , ▁and ▁institution al ▁framework ▁to ▁respond ▁to ▁the ▁threat ▁out s our cing ▁pos es ▁to ▁public ▁values ." ▁Writing ▁in ▁Le iden ▁Journal ▁of ▁International ▁Law , ▁Rain ▁Li ivo ja ▁notes ▁that ▁the ▁book ▁explains ▁" how ▁the ▁formal ▁legal ▁rules — wh ether ▁ ▁national ▁or ▁international — should ▁not ▁be ▁seen ▁as ▁a ▁pan ace a ▁and ▁how ▁there ▁are ▁other ▁mechan isms ▁for ▁ens uring ▁respect ▁for