Brilliant animation and explanation of empathy:
I watched that video on your channel yesterday. Cool.

As well as some great neuroscience insight, it reminded me of Robert Wright's non-zero ideas.
Here's a quote from
http://en.wikipedia.org/wiki/NonzeroThe principal argument of Nonzero is to demonstrate that natural selection results in increasing complexity within the world and greater rewards for cooperation. Since, as Wright puts it, the realization of such prospects is dependent upon increased levels of communication, cooperation, and trust, what is thought of as human intelligence is really just a long step in an evolutionary process of organisms (as well as their networks and individual parts) getting better at processing information.