Empathy is old, but empathy, like everything else in life, comes on a sliding scale and has its elaboration. So there's basic empathy: you feel sad, it makes me sad. I see you happy, it makes me happy. Then there's something that I call sympathy, a little more removed: "I'm sorry to hear that your grandmother has just passed away. I don't feel that same grief, but I get it; I know what you feel and it concerns me." And then if we're motivated to act on sympathy, I call that compassion. Far from being the thing that makes us human, human empathy is far from perfect. We round up empathic creatures, we kill them and we eat them. Now, maybe you say OK, well, those are different species. That's just predation, and humans are predators. But we don't treat our own kind too well either. People who seem to know only one thing about animal behavior know that you must never attribute human thoughts and emotions to other species. Well, I think that's silly, because attributing human thoughts and emotions to other species is the best first guess about what they're doing and how they're feeling, because their brains are basically the same as ours. They have the same structures. The same hormones that create mood and motivation in us are in those brains as well.