There has been a lot of science lately – e.g. Rick Hanson, PhD – behind the development of the three brains that human beings have. That’s right: Not one brain but three!
The oldest and least evolved part of the brain is the reptilian brain. It is responsible for the fight/flight/freeze response and is about survival.
The second evolved brain is the mammalian brain, which is all about touch and relationship.
What these three brains tell us is that all people have three fundamental needs that have to be addressed:
How are we fulfilling these needs in our own lives and the lives of those around us?