And that's just the top rung of the inequality ladder. GAP's mission statement says great apes are entitled to rights based on their "morally significant characteristics." It says they
enjoy a rich emotional and cultural existence in which they experience emotions such as fear, anxiety and happiness. They share the intellectual capacity to create and use tools, learn and teach other languages. They remember their past and plan for their future. It is in recognition of these and other morally significant qualities that the Great Ape Project was founded.
Morally significant qualities. Morally significant characteristics. These are appeals to discrimination, not universal equality. Most animals don't have a rich cultural life. They can't make tools. They don't teach languages. Singer even points out that "chimpanzees, bonobos and gorillas have long-term relationships, not only between mothers and children, but also between unrelated apes." Special rights for animals in committed relationships! It sounds like a Moral Majority for vegans.
Opening your mind to science-based animal rights doesn't eliminate inequality. It just makes the inequality more scientific. A rat can't match a pig, much less a boy. In fact, as a GAP board member points out, "We are closer genetically to a chimp than a mouse is to a rat."
George Orwell wrote the cruel finale to this tale 63 years ago in Animal Farm: "All animals are equal. But some animals are more equal than others." That wasn't how the egalitarian uprising in the book was supposed to turn out. It wasn't how the animal rights movement was supposed to turn out, either.