Chimpanzees are humanity's closest living relatives, sharing approximately 98.7% of our DNA. Their social complexity, emotional depth, and cognitive sophistication make their welfare in captivity a particularly significant ethical concern.
Chimpanzee welfare in captivity is shaped by the profound gap between their natural social world and what any facility can provide. Wild chimpanzees navigate complex political alliances, form lifelong bonds, cooperate in hunts, and engage in behavior - including warfare - that reflects sophisticated group cognition. In zoo settings, fixed social groups in confined spaces create conflicts that cannot be resolved through the natural mechanisms of avoidance and dispersal. The emotional depth of chimpanzees - their clear grief, joy, fear, and social longing - means that welfare failures are experienced acutely. Research chimpanzees who survived decades of invasive studies showed clear trauma responses when retired to sanctuary - demonstrating that cognitive complexity and capacity for suffering are directly linked.