Chimpanzees share 98.7% of human DNA and face welfare threats from bushmeat hunting, habitat destruction, and disease transmission that cause acute suffering and long-term population decline.
Chimpanzee welfare harms from human activity are extensive and deeply troubling given their cognitive and emotional complexity. Chimpanzees demonstrate grief responses to the death of group members, console distressed individuals through physical contact, and form lifelong social bonds. The welfare cost of losing a community member to hunting — experienced by surviving individuals — almost certainly involves something analogous to grief and social disruption. Orphaned infants sold into the pet trade face lifelong social deprivation: raised without conspecific social learning, they cannot be reintegrated into wild communities as adults. Disease transmission from ecotourists and researchers has killed chimpanzees in habituated study communities despite strict protocols. The combination of cognitive sophistication and population vulnerability makes chimpanzee welfare a particularly urgent conservation and ethics priority.