TheL UCIFERE FFECT UnderstaHnodwGi onogPd e opTluerE nv il PhilZiipm bardo Creaotfo rl andmSaTrAk1 F ORDP RI ON EXPERIMENT the Praise for ThLeu cifer Effect "Alplo liticainadsn osc icaolm mentat.o.rs.sh oulrde atdh i.s. .A.n im- portabnoto k." -The T(iLmoends)o n "Af ormidapbileeco efr esearicnhtt oh en aturoefe vil." -TheO bser(Uv.eKr. ) "Riveting." -Skeptic "A thorougnhar rativet heS tanfoPrrdi soEnx perimewintth an of analysoifts h es ocidayln amicosft heA buG hraipbr isoinnI ra.q. . ad iscussoifto hnep sycholoofge yv ials ,t rocnrgi ticoifts hmeB usha d­ ministraatnidoa n c,h aptceerl ebrahteirnogi asnmd c allifnoggr r eater socibarla ve.r.y.T .h iasc counAtb'usG hraifbo cuwsi lgle nerate consid­ erabdleem and". -Booklist "Ina nothteirm eP,h ilZiipm bardmoi ghbte l ikenteoad n O ldT estament prophoeftd oomb,u tt hea uthoirsn otd ealiwnigt ohm ensa ndu nreali­ tiersa,t heqru,i tteh eo pposiHtiesa. n atomoyf h umanp sycholaongdy contemporcaurlyt uirsae s s cholaarsli yti ss carTyh.i bso okt akeuss wheraen geflesa trot reaudn,c overtihneg' Luciftehra'st i tisn cubating ine acihn dividaunadle verhyu mani nstituPtoiloint.ei ccosn,o mihciss.­ torayn de verne ligarieo anl rle veaalseb de intga intweidt iht esv islp oor. The professtoirm'essl tyu dy scroeuatam tsu st ob eo nt hea lerttob, e evemri ndfaunld e verre ady lweeaf saitl nl ttoh ihse arotfu ttedra rkness. We shoulbdeg rateffouhrli isn sigahntdh eedh iwsar ning." -BRIANK EENAN, authoorfA nE vCirald ling "Zimbarddeos ervheesar tfetlhta nkfso dri sclosainndig l luminatthien g darkh,i ddecno rneorfst heh umans oul." -VACLAVH AVEL, formeprr esidoefnt th eC zecRhe public "Drawionnga l ifetoifmb er illrieasneta rZcihm,b arddeom onstrhaotwe s goodp eoplcea nb et ransforimnetd'o e vdiole rbsy't hep oweorf s itua­ tion--eveyno u!H ed ecodheosw t heB usha dministraitnti hoedn e,l u­ siotnh aitta loncea nr itdh ew orlodf t hee violft errorihsamst, u rned intaom odeolf ' administervaitlBi.uv'teZ imbaradlos oof feursas v ision ofh oww ec anc halleanngu en jussyts tem." --GAIL SHEEHY, authoorfP assages "Itfh erhea sb eena morei mportaanntdc ompellbionogkw rittientn h e lasttw enty-yfievaer Is',v neo te ncounteirteZ.di mbardoe'nsg agianngd beautifwurliltytt eonu dre f orucnec ovtehrseso urcoefse viTlh.L eu cifer Effeacctc omplimsohreest hasni mpmlayk intgh ed arknevsiss ibiltae l;s o helptsom akel ightnpeossss ibIltie sc. r uciraela difnoger v eryone." -JOND .H ANSON, profesosfLo arw H,a rvarLda wS chool "Int heS tanfoPrrdi soEnxp erimePnhtiZ,li mbarbdoot tleevdii lna labo­ ratorTyh.e l essohnesl earnsehdo wu so urd arnka turbeu ta lsfiol uls withho pei fw eh eedt heir couTnhsLeeu lc.i Effefrree cadtls i kaen oveils. asp rofouansdt heh olieosfst c riptuarnedsi ,sa ta ltli mebsa ckebdy sounsdc ientriefisce arc.h" -ANTHONYP RATKANIPSH,. D., foundiendgio trS, ocIinafllu ence, profesesmoerr itoufps s ycholUongiyv,e rsoifCt ayl ifornia "Aso neo ft hes enioCrr iminIanlv estigDaitviiosnia ogne ntwsh os aw conditiaotAn bsu C raifirbs thanidt,i sc leatrom e thaPth iZli mbardo truluyn derstaanltdlhs e f actotrhsac ta mei ntpol atyh ere. booki sa His must-read." -CW4 MARCDIRAE WRY, retireUdS AC IDCs peciaagle nt "Zimbarpdroo vetsob ea masternfaurlr ataonrdp acetsh es toraytj ust ther ighstp ee.d. .[.H ei sl ikea] charminegx plorwehro d esperately wantuss t ou nderstaan nedw antde rrifwyoirnlgtd h ahte 'dsi scovered." -ThHea rvCarridm son "ThLeu ciEffefrme ackte sf ore ngagirnega dianngd i sa valuabalned scholacrolnyt ributtoit ohneu nderstanodfit nhgee ssenocfeh uman nature." -JAMAT,h Jeo uronfta hlAe m eriMceadincA asls ociation "Thiism portabnotos kh oulbder equirreeadd innogto nlfyo sro cisacli en­ tisbtust,a lsfoo pro liticdieacniss,im oakne rse,d ucataonrdsj usatb out anyoneel sdei sturbbyet dh es elf-destrduicrteicvteii onwn hsi cht he UnitSetda taensd t her esotft hew orlsde emt ob em oving." -AmeriSccaine ntist Alsob yP hilipZim bardo ShynWehsasIt:It s W,h attDo o A boIutt ThSeh y C(hciol-adu thor) PsychaolnLodig (fyce o -author) PsychoCloorCgeoy n:c (ecpot-sa uthor) ThPes ychooflA otgtyei tud ChanagnSedo cial (Icnofl-uaeuntcheo r) THE LUCIFER EFFECT THE LUCIFER EFFECT UnderstHaonwdG ionoPgde opTluerE nv il Philip Zimbardo 0 RANDOM HOUTSREA DPEA PERBACKS NEW YORK Dedicattote hdes erehneer oionfe life, my Christina MaZsimlbaacrhd o 200R8a ndoHmo usTer adPea perbaEdcikt ion Copyrig2ht0©0 b7y P hilGi.Zp i mbardo, Inc. Alrli ghrtess erved. Publisihnte hdeU nitSedt atebsy R andoHmo usTer adPea perbacks, ani mprionfTt h eR andoHmo usPeu blishGirnogu p, ad ivisoifRo an ndoHmo useI,n. cN. e wY ork. RANDOM HOUSTRADEE PAPERBACaKnSdc olopharoen t rademarks ofR andomH ouseI,n c. Originpaulbllyi sihnhe adr dcoivnet rh eU nitSetda tbeysR andoHmo use, an ImprionfTt h eR andoHmo usPeu blishGirnogu p, ad ivisoifRo ann doHmo useI,n ci.n,2 070. LibraroyfC ongreCsast aloging-In-PuDbaltiac ation ZimbardPoh,il iGp. Thelu ciefffeerc utn:d erstanhdoiwgn ogo pde optluer env /i l PhilipZ imbardo. p. em. Inclubdiebsl iograrpehfiecraelan ncdei sn dex. ISBN9 78-0-8129-7444-7 I.Go oda nde vil-PsycholaosgpeicctaslI. T. i tle. BF789.5E6924 0Z07 IS5 9.' 62�c22 2006050388 Printiednt hUen ited SotfAa mteesr ica www.atrandom.com 4 6 8 9 7 5 � Boodke sign byE vMeerrectetde s Forweord SinTcheLe u cifEeffre(c TLtE w)a psu bliisnlh aeMtdae r c2h0 70I.h avgei vmeonr e thaanh undrmeedd iinat eravnildee wcst autcr oelsl aengcdeo snr feencreesa,d the mraenvyi emwysb ooofak n,rd e spondmeudc rhet aod feeedrb aIcntk h.e procoefsd soi snogI, h avlee artnheasdto mmies concepetxiiaosbntos mu yt viewwhsi,Ic w hi altlt etmocp otr rheecrItena . d ditIhi aovhnea, d snoemwie d eas thaIw ta nttod eawilt hb ribeefflyoyor seut arreta ding. Firswth,a tt hLeu ceirf It mandyi fefnebtru,rt e latthegidsnI,.n i­ is Effecits? tiya,ili tlts h set oorfty h ceo smtirca nsfoormfGa o'tdfisao vno arnigtLeeul c,ei rf, aka" ThMeo rniSntgari ,n"tS oa tatnhD,ee vbielc,a huesc eo mmitttehtdew in sionfsD isobetdoiG eonadcn ePd r i(dt"eh agto ebtehf oafr lael I"wt)a .sG oda,c ­ cordtioan ngc isecnrti pturcerse,a Htweehaldosl s paa tcoee m braalctelh e fallen angealntsdh ohsuem awnhsow oulladt yeiret lotd h etierm ptations. Thatt himeso setx traermoceft ransforimmaatgiionanan bsdlo se e,tt hse contfeoxmrty i nvestiignatltoei sohsnuesmr a tnr ansforomfga otoido,n so rdi­ naryp eopnloaetn, g eilnspt,eo r petorfea vtiionrlre ss potnots hceeo rirvoiesn flu­ encoefp owersfiutlu atfroicoenTsah.lo sfroec etsh aetx iisnmt a ncyo mmon behavcioonrtaaelrxt meso rlei kteodl iys toourrt ugsouonadal t ubrype u shing ust owaerndg agiindn egv idaensttr,u cotrei vvbieel,h avwihoetrnh see ttairneg s newan d unfamiWlhieaner m.b edidnet dh eomu,hr a biwtauyaoslft hinking, feelianngda, c tinnolg o ngfenurc tiotnos usttahimeno rcaolm patshsah ta s guiduesrd e liiantb hlpeya st. Ic halltehntegr ea ditfcoiuoosnn at lhi en diviidnunanelar't sud ries,po si­ tiopenrss,o natlriaatinytcd sh ,a raacstt heperr imaanrodyf ttehnse o tlareg ient understhaunmdaifnna gi lings.I 'ar gIuntesh tawetha idml,oe s pte opalrgeeo od mosotft htei mteh,ec ya bne r eadsieldyu icnetedon gagiinwn hgaw to ulndo r­ malqluya yl ifeasg o-adleieedanssa , n tisaoscd ieastlr,u ocfot tihveTerh sas.te ­ ductoirino int iaitnitoonc aebnve ui nld ersbtyro eocdo gntizhiamntog sa tc tors arneo sto lifitgaurrimyep sr ovissoilnigl ooqnut iheeems p tsyt aogfle i Rfaet.h er,