A model for how we think. Either fast and lose or slow with the possibility of more correct decisions.
Thinking fast we risk jumping to conclusions, not see the broad picture, have planning fallacies, framing based decisions.
Thinking slow: we can step back and compare things. Look out side the box. Look at the problem from multiple framings.

I think this is a book that I will read again in a year or two. This is my second reading.