TED: VS Ramachandran: The neurons that shaped civilization

Neuroscientist Vilayanur Ramachandran outlines the fascinating functions of mirror neurons. Only recently discovered, these neurons allow us to learn complex social behaviors, some of which formed the foundations of human civilization as we know it.

Wikipedia:
http://en.wikipedia.org/wiki/Vilayanur_S._Ramachandran
http://en.wikipedia.org/wiki/Mirror_neuron