This is one of my favorite theories. Here is a presentation about it:
For fun, you can watch this video taken from “The Curious Case Of Benjamin Button” movie.
Or this documentary video:
For want of a nail the shoe was lost; For want of a shoe the horse was lost; For want of a horse the rider was lost; For want of a rider the battle was lost; For want of a battle the kingdom was lost. And all for the want of a horseshoe nail.
- Chaotic Butterflies (creatingreciprocity.wordpress.com)