We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleChimpanzees are indifferent to the welfare of unrelated group members.AuthorsSilk JB; Brosnan SF; Vonk J; Henrich J; Povinelli DJ; Richardson AS; Lambeth SP; Mascaro J; Schapiro SJPublicationNature, 2005, Vol 437, Issue 7063, p1357ISSN1476-4687Publication typearticleDOI10.1038/nature04243