Fromterroristdisputestosplinteroffshoots,aninsidelookathowarmedgroupsbreakapart.Terrorist,rebel,andinsurgentgroupsarehighlyunstable.Amidfearsofdefeatandevendeath,intensedisagreementshavetornmanyorganizationsapart,fromSyriatoIraq,IrelandtoSpain.Andwhilesomeofthesedivisionshaveprecededagroup’sdeclineandeventualdefeat,othershavelaunchedsomeofthemostnotoriousanddeadlyorganizationsinrecenthistory.InDividedNotConquered,EvanPerkoskianalyzeshowarmedgroupsfractureandhowbreakawaysplintergroupsbehave.Perkoskitakesanunprecedentedlookinsidetheseorganizationstounderstandthespecificdisagreementsthatcausegroupstobreakapart,likethoseoverideology,leadership,andstrategy.Drawingonresearchfromorganizationalstudiestosocialpsychology,andleveraginganalogiesfrombusinessfirmstoreligioussects,Perkoskishowshowthesedisputesuniquelyshapethebehaviorandsurvivabilityofemergingsplinters.Whenmotivatedbysingle,shareddisagreements,splintersexhibithighercohesion,clearerobjectives,andgreatersurvivability.Whenmotivatedbystrategy,splintersattracthardlineoperativeswhosteerthegrouptowardsincreasinglylethaltacticsandstrategies.IncludingcasestudiesofrepublicanmilitantsinNorthernIreland,BasquemilitantsinSpain,andtheIslamicStateinSyriaandIraq,DividedNotConquereddemystifiesacomplexyetcommonphenomenonwithramificationsforcounterinsurgency,counterterrorism,andourunderstandingofincreasinglyfragmentedconflictsaroundtheglobe.
