So, we know that chimpanzees, for example at a waterfall, can show what we might understand as a sense of awe and wonder. We know that chimpanzees can take the perspective of another through theory of mind. We know that they can show empathy, compassion, that they have their own rituals and their own rules. And so I think that we wouldn't be where we are today without our primate past, which includes, of course, not only living apes, but what we'll talk about later I imagine, other human ancestors. Early Homo sapiens, Neanderthals.