In the book, Rosling suggests the vast majority of human beings are wrong about the state of the world. He shows that his test subjects think the world is poorer, less healthy, and more dangerous than it is.
Rosling recommends thinking about the world as divided into four levels based on income brackets. He suggests ten instincts that prevent us from seeing real progress in the world.
These are listed as Gap, Negativity, Straight Line, Fear, Size, Generalization, Destiny, Single, Blame, and Urgency.