1 2 A neurobiological association of revenge propensity during intergroup conflict 3 4 Xiaochun Hana, Michele J. Gelfandb, Bing Wuc, Ting Zhanga, Wenxin Lid, Tianyu Gaoa, 5 Chenyu Panga, Taoyu Wua, Yuqing Zhoua, Shuai Zhouc, Xinhuai Wuc,1, Shihui Hana,1 6 7 aSchool of Psychological and Cognitive Sciences, PKU-IDG/McGovern Institute for Brain 8 Research, Beijing Key Laboratory of Behavior and Mental Health, Peking University, Beijing, 9 China 10 bDepartment of Psychology, University of Maryland, USA c 11 Department of Radiology, The 7th Medical Center of PLA General Hospital, Beijing, China 12 dPeking-Tsinghua Center for Life Sciences, Peking University, Beijing, China 13 14 15 16 Address correspondence to: 17 Shihui Han Ph.D. Prof. 18 School of Psychological and Cognitive Sciences 19 Peking University 20 52 Haidian Road, Beijing 100080, China 21 Phone: (86) 10-6275-9138 22 Email:
[email protected] 23 or 24 Xinhuai Wu. M.D. 25 Department of Radiology 26 PLA Army General Hospital 27 5 Nanmencang, Beijing, 100070, China 28 Phone: (86) 10-8400-8368 29 Email:
[email protected] 30 1 31 Abstract 32 Revenge during intergroup conflict is a human universal, but its neurobiological 33 underpinnings remain unclear. We address this by integrating functional MRI and 34 measurements of endogenous oxytocin in participants who view an ingroup and an outgroup 35 member's suffering that is caused mutually (Revenge group) or respectively by a computer 36 (Control group). We show that intergroup conflict encountered by the Revenge group is 37 associated with an increased level of oxytocin in saliva compared to in the Control group.