Causation This page intentionally left blank Causation A User’s Guide L. A. Paul and Ned Hall 1 3 GreatClarendonStreet,Oxford,ox26dp, UnitedKingdom OxfordUniversityPressisadepartmentoftheUniversityofOxford. ItfurtherstheUniversity’sobjectiveofexcellenceinresearch,scholarship, andeducationbypublishingworldwide.Oxfordisaregisteredtrademarkof OxfordUniversityPressintheUKandincertainothercountries #L.A.PaulandNedHall2013 Themoralrightsoftheauthorshavebeenasserted FirstEditionpublishedin2013 Impression:1 Allrightsreserved.Nopartofthispublicationmaybereproduced,storedin aretrievalsystem,ortransmitted,inanyformorbyanymeans,withoutthe priorpermissioninwritingofOxfordUniversityPress,orasexpresslypermitted bylaw,bylicenceorundertermsagreedwiththeappropriatereprographics rightsorganization.Enquiriesconcerningreproductionoutsidethescopeofthe aboveshouldbesenttotheRightsDepartment,OxfordUniversityPress,atthe addressabove Youmustnotcirculatethisworkinanyotherform andyoumustimposethissameconditiononanyacquirer BritishLibraryCataloguinginPublicationData Dataavailable ISBN 978–0–19–967344–5(hbk) 978–0–19–967345–2(pbk) PrintedinGreatBritainby CPIGroup(UK)Ltd,Croydon,CR04YY LinkstothirdpartywebsitesareprovidedbyOxfordingoodfaithand forinformationonly.Oxforddisclaimsanyresponsibilityforthematerials containedinanythirdpartywebsitereferencedinthiswork. Contents Preface vii Annotated list of figures ix 1 The scope and aims of this “guide” 1 1 Introduction 1 2 Someremarksonmethod 2 3 Overviewoftheproject 4 2 Framework and preliminaries 7 1 Framework 7 2 Therivalapproaches 13 3 Methodologicalredux 24 4 Topicsnotaddressedindetail 58 3 Varieties of redundant causation 70 1 Jointeffects 70 2 Earlypreemption 74 3 Tampering 92 4 Latepreemption 99 5 Overdetermination 143 6 Black-boxcases 161 7 Thelessonsofredundantcausation 168 4 Causation involving omissions 173 1 Threekindsofcases 173 2 Thequestionofuniformtreatment 176 3 Troublewithcausationinvolvingomissions 190 4 Methodologyyetagain 212 5 Accommodatingomission-involvingcausation 212 5 Cases that threaten transitivity 215 1 Doubleprevention 215 2 Switching 232 vi CONTENTS 6 Concluding remarks 245 1 Adeepdivide 245 2 Themethodbycounterexample 249 3 Thecausalmethod 252 4 Cognatedebates 257 References 261 Index of Names 269 Subject Index 271 Preface This book grew out of a series of conversations that began at Princeton in the1990s.Asgraduatestudents,westudiedcausationwithDavidLewis,and when Lewis ran a seminar in 1996 devoted to the problems and puzzles of counterfactual analyses of causation, it began a discussion about the nature of causation that lasted throughout the process of writing dissertations, to tenure,andbeyond.Thebookwastrulyco-authored,inthesensethateach chapterwaswrittenandrewrittenbyeachofus,sometimesaswesatinthe sameroom,andsometimesasweworkedtogetheronline,andmanyofthe sections of the chapters were developed from conversations in which we developed joint views about the right perspective on the metaphysics of causation. We owe thanks to many interlocutors over the years. We are especially grateful to David Lewis, who was the best of all possible mentors. We also want to give special thanks to Chris Hitchcock, who engaged in many detailed discussions of causal modeling, and to Jonathan Schaffer, who read the entire book at least twice and gave us extensive, excellent—and spirited—comments each time. WealsothankRobertAdams,SaraBernstein,MichaelBertrand,Thomas Blanchard, Douglas Ehring, Alvin Goldman, Caspar Hare, Kieran Healy, Marc Johansen, Dan Korman, Christian Loew, Dan Marshall, Tim Maud- lin, Stephen Morgan, Alyssa Ney, Agustin Rayo, Raul Saucedo, Bradford Skow, Holly Smith, Eric Swanson, Michael Strevens, Judith Jarvis Thom- son, Brad Weslake,Stephen Yablo, the membersof Bradford Skow’s 2009 causation seminar at MIT, members of our causation graduate seminars at Yale, Arizona and Harvard, two anonymous referees for OUP for discus- sion and comments, and Peter Momtchiloff for his editorial support and endless patience. The Frank H. Kenan Fellowship, awarded by the National Humanities Center, with additional support provided by the University of North Carolina, provided crucial support for Paul in 2011–12. viii PREFACE Finally,we’dliketothankourspouses.Althoughneitherofushavewives who typed our manuscripts and corrected our typos, we have something infinitely more valuable: incredibly patient, supportive and loving spouses whoprovidedsomuchoftheirtime,energyandemotionalsupportduring thelongandinvolvedprocessofcreatingthisbook.Thankyou,Kieranand Barbara. Annotated list of figures Figure1 9 C D E A B Attime0,CandAbothfire.CsendsastimulatorysignaltoD,which firesattime1.AsendsastimulatorysignaltoB,buttheinhibitorysignal fromC(symbolizedbythelinewiththeblobontheend)blocksit,so Bdoesnotfire.DsendsastimulatorysignaltoE,whichfiresattime2. See:Chapter2,}1.2,}2.2,}2.2.1,}2.2.3,}2.3,}2.4,}3.1.2,}3.3.2,}3.3.4;}4.3; Chapter3,}2,}2.1,}2.2,}2.3,}2.3.1,}2.3.2,}2.3.3,}2.4,}2.5,}3.1,}3.2,}3.3; Chapter5,}1.2. Figure2 9 C D E A B Attime0,onlyAfires.AsendsastimulatorysignaltoB,whichfires attime1.BsendsastimulatorysignaltoE,whichfiresattime2. See:Chapter2,}1.2,}2.2.1,}3.3.2. Figure3 15 C E A Attime0,onlyCfires.CsendsastimulatorysignaltoE,whichfires attime1.IfAhadfiredattime0,Ewouldnothavefired. See:Chapter2,}2.1;Chapter4,}1.1,}2.3,}3.1,}3.4.2.