▁ ▁After ▁leaving ▁the ▁ID F , ▁he ▁worked ▁for ▁the ▁Jewish ▁Agency ▁for ▁Israel , ▁heading ▁its ▁Youth ▁and ▁P ione ering ▁Department ▁until ▁ 1 9 7 7 . ▁ ▁He ▁became ▁one ▁of ▁the ▁leaders ▁of ▁the ▁Peace ▁Now ▁movement , ▁and ▁was ▁elected ▁to ▁the ▁K ness et ▁in ▁ 1 9 8 4 ▁on ▁the ▁R atz ▁list . ▁However , ▁he ▁res igned ▁from ▁the ▁K ness et ▁on ▁ 2 6 ▁November ▁ 1 9 8 6 , ▁and ▁was ▁replaced ▁by ▁David ▁Z ucker . ▁ ▁Books ▁Books ▁Bar - On ▁has ▁author ed ▁include : ▁ ▁The ▁G ates ▁of ▁Gaz a ▁( 1 9 9 4 ) ▁ ▁In ▁P urs uit ▁of ▁Peace ▁( 1 9 9 6 ) ▁ ▁Never - ending ▁Conf lict : ▁Isra eli ▁Military ▁History ▁( 2 0 0 4 ) ▁ ▁Mos he ▁Day an : ▁Israel ' s ▁Cont ro vers ial ▁Hero ▁( 2 0 1 2 ) ▁ ▁References ▁ ▁External ▁links ▁ ▁Category : 1 9 2 8 ▁birth s ▁Category : L iving ▁people ▁Category : Pe ople ▁from ▁Tel ▁Av iv ▁Category : J ew s ▁in ▁Mand atory ▁Palest ine ▁Category : Is ra eli ▁anti - war ▁activ ists ▁Category : Is ra eli ▁soldiers ▁Category : Head s ▁of ▁the ▁Jewish ▁Agency ▁for ▁Israel ▁Category : H eb rew ▁University ▁of ▁Jerusalem ▁al umn i ▁Category : Sch ool ▁of ▁International ▁and ▁Public ▁Affairs , ▁Columbia ▁University