Thesis: the mind is made out of ‘layers’ of modules and functions, starting with the most rudimentary, basic, and primitive, and moving to the most complex and subtle.

Takeaway: all inhibition can fail. The more powerful the activity of the lower processes, the less likely it will be that the frontal lobes will be able to control them. Faced with more than it can handle, the 'angel brain' can be overwhelmed, letting the more basic modules to influence behavior and thinking.