Initial analyses by the Externalizing Consortium were funded by the National Institute of Alcohol Abuse and Alcoholism through an administrative supplement to R01AA015146. D.M.D. was supported through funding from the National Institute of Alcohol Abuse and Alcoholism (K02AA018755, U10AA008401, and P50AA0022527). P.K. was supported through a European Research Council Consolidator Grant (647648 EdGe). K.P.H. was supported by the Eunice Kennedy Shriver National Institute of Child Health and Human Development: (R01HD092548 and R01HD083613) and the Jacobs Foundation. A.A.P. was supported by the National Institute of Alcohol Abuse and Alcoholism (R01AA026281) and the National Institute of Drug Abuse (P50DA037844). S.S.R. was supported through a NARSAD Young Investigator Award from the Brain and Behavior Foundation (grant number 27676). Both A.A.P. and S.S.R. were supported by funds from the California Tobacco-Related Disease Research Program (TRDRP, grant numbers 28IR-0070 and T29KT0526). The content of this article is solely the responsibility of the authors and does not necessarily represent the official views of the above funding bodies. This research used data from Add Health, a program project directed by K.M.H. (principal investigator) and designed by J. R. Udry, P. S. Bearman, and K.M.H. at the University of North Carolina at Chapel Hill, and funded by grant P01HD031921 from the Eunice Kennedy Shriver National Institute of Child Health and Human Development, with cooperative funding from 23 other federal agencies and foundations. Information on how to obtain the Add Health data files is available on the Add Health website (www.cpc.unc.edu/addhealth). This research used Add Health GWAS data funded by Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD) grants R01HD073342 to K.M.H. (principal investigator) and R01HD060726 to K.M.H., J. D. Boardman, and M. B. McQueen (multiple principal investigators). COGA is a national collaborative study supported by NIH Grant U10AA008401 from the National Institute on Alcohol Abuse and Alcoholism and the National Institute on Drug Abuse. Data were obtained from Vanderbilt University Medical Center’s BioVU which is supported by numerous sources: institutional funding, private agencies, and federal grants. These include the NIH funded Shared Instrumentation Grant S10RR025141; and CTSA grants UL1TR002243, UL1TR000445, and UL1RR024975. Genomic data are also supported by investigator-led projects that include U01HG004798, R01NS032830, RC2GM092618, P50GM115305, U01HG006378, U19HL065962, R01HD074711; and additional funding sources listed at https://victr.vumc.org/biovu-funding/. Support for data collection for the Philadelphia Neurodevelopment Cohort (PNC), acquired through dbGaP (accession number phs000607.v3.p2), was provided by grant RC2MH089983 awarded to Raquel Gur and RC2MH089924 awarded to Hakon Hakonarson. Subjects were recruited and genotyped through the Center for Applied Genomics (CAG) at The Children’s Hospital in Philadelphia (CHOP). Phenotypic data collection occurred at the CAG/CHOP and at the Brain Behavior Laboratory, University of Pennsylvania. A full list of funding for investigator effort is listed in the supplementary material of the publication “Genomic analysis of 1.5 million people uncovers genes related to addiction, antisocial behavior, and health.”