Are we not men?

...Until a few years ago, making such inference and diagnosing elephants with PTSD would have been dismissed as anthropomorphism. But no longer. Elephant psychopathology, chimpanzee infanticide and other un-animal-like behaviors are part of a growing body of research that suggests science is building toward a radical paradigm shift. Streams of new data and theories, critically from neuroscience, are converging into a new, trans-species model of the psyche. Humans are being reinstated back into the species continuum that Darwin articulated, a continuum that includes laughing rats, octopuses with personalities, sheep who read emotions from the faces of their family members and tool-wielding crows.

We now understand that all vertebrates, and it is argued even some invertebrates, share many biological structures and processes that underlie attributes once considered uniquely human: empathy, personality, culture, emotion, language, intention, tool-use and violence. Furthermore, we are able to see beyond species differences in ways we have never been able to before. Neuroimaging advances such as PET and fMRI can help map more elusive subjective qualities—such as emotion, states of consciousness and sense of self—to specific regions of the brain. In conjunction with a rich legacy of observational data and theories on animal behavior and human psychology, neuroscience is bridging long-standing conceptual and perceptual gaps....