2.5million Year History of Leadership

Just watched a very interesting video of psychologist Mark van Vugt fusing evolutionary history and science to show how the evolution of leadership affects us all.  Some interesting ideas I took from it include:

1. That democracy may have started in the African savannah and not in Greece.
2. The reason human brains may be larger than other species is that we have to deal with larger social groups than other species.
3. There is a tendency for people to choose the taller candidate.  Does this relate to our evolution?
4. That children can more accurately guess which candidate will win than adults.

[youtube=http://www.youtube.com/watch?v=gytQGJ1BYVM]