Great apes share over 98% of DNA with humans and demonstrate self-awareness, culture, and complex emotional lives. Their welfare protection and potential legal personhood is a frontier of both science and law.
Great apes occupy a unique moral position: their cognitive and emotional similarities to humans are so well documented that their welfare interests command consideration at a qualitatively higher level than most non-human animals. The case for legal personhood that would grant them enforceable rights against arbitrary captivity has been argued seriously in multiple legal systems. Regardless of legal outcome, their welfare deserves priority in conservation, research ethics, and captive management standards.