Happiness, in one sense, is a function of how closely our world conforms to the infinite variety of human preference.

I'm convinced that ideas and behaviors and new products move through a population very much like a disease does.

I don't like things that aren't true.

Six degrees of separation doesn't mean that everyone is linked to everyone else in just six steps. It means that a very small number of people are linked to everyone else in a few steps, and the rest of us are linked to the world through those special few.

Ideas and products and messages and behaviors spread just like viruses do.

As human beings, we always expect everyday change to happen slowly and steadily, and for there to be some relationship between cause and effect.

Truly successful decision-making relies on a balance between deliberate and instinctive thinking.