In nature, the formation of a thunderstorm is a possible consequence of the action of light upon water, causing evaporation, subsequent cloud formation, thunder, lightning, rain and winds.  These are events which happen from the very nature of the materials and energy interactions, without the need for any conscious intervention by man

For humanity, however, the interactions between people are far more complex and not so readily reduced to basic physical interactions.  These interactions are even more complicated given that man has the ability to accumulate a personal historical memory which provides a background basis for all future decision events.  Often however, and unfortunately the decisions made could be made without realising the situation around previous events t=do not reflect making decisions each time an event happens that engages any individual person.  This means that as no two have exactly the same history or response to events the decisions any individual makes is not readily predictable