His exploration examines the connections with other distinctively human features: the development of language, self-consciousness, religious practices, and empathy. Neuroanatomy and neurophysiology of the brain have uncovered unique human characteristics; mirror neurones, for example, explain why we unconsciously imitate actions and behaviour. Whereas Nietzsche argued that artistic tragedy was born with the ancient Greeks, Trimble places its origins far earlier. His neurophysiological and evolutionary insights shed fascinating light onto this enigmatic part of our humanity.