For most of human history the life experiences of people have been overwhelmingly linear. Human are accustomed to encountering situations that reflect a simple proportional relationship between cause and effect. People expect that when they do X that Y will happen if Y was what happened in the past. This type of linear relationship is comforting to people since it is familiar. Ray Kurzweil believes: “our intuition about the future is linear because that is the way the world worked for most of history. Prey animals did not get exponentially faster for example.” Except for a virus or bacterial infection multiplying inside your body, few things in ordinary life are nonlinear.