Most of us think that our world is full of causes and effects. Things don’t just happen randomly, but often, if not most of the time, things are the way they are, events happen, because of other things or events that are their causes. A kitchen window is shattered into a hundred pieces and a rock is found lying outside. A cookie jar is empty and crumbs are found scattered beneath it. These are not random events but have explanations, causal explanations.