“…Males, and alloparents in general, may increase their fitness by influencing the behavior of conspecifics in their social group, as they would when disciplining another dolphin. Studies on punishment in humans and primates have suggested that punishment evolved as a way to encourage cooperation and reduce selfish behavior in social groups (Boyd, Gintis, & Bowles, 2010;Gardner & West, 2004;Jensen, 2010;Riedl, Jensen, Call, & Tomasello, 2012;Seymour, Singer, & Dolan, 2007). A review of punishment in animal groups (Clutton-Brock & Parker, 1995) suggested that punishment from a dominant animal to a subordinate can increase the dominant animal's fitness.…”