Man has evolved over millions of years as described by Charles Darwin from primates. The tail probably disappeared overtime and a human being also evolved from being a quadruped to a biped. If we for a moment imagine that we are in outer space and view the earth this is what we will observe. The human race at any point in time will be like a random arrangement of billiard balls. We are spread out in finite space in a random fashion. These billiard balls are all vibrating in and interacting with each other. We interact with each other changing this random arrangement locally..
However, this influence is limited and we can affect only a few of the billiard balls with a large number being completely unaffected. Many centuries earlier a man’s influence was fairly local. It would take a long time for the influence to propagate to larger set of people. Nowadays with the advent of the world wide web we can influence people at larger distances but still the influence is very limited with a large section of the human race being unaffected.
We can easily visualize our daily interactions as gentle collisions in this random arrangement of billiard balls on this finite space. We can either be acted by an external event of nature which can change this random arrangement or we can make a change, of our own volition in a small, limited way on this random arrangement.
Mankind from time immemorial has been just a random arrangement of people on which is superimposed the principle of survival and learning. The human race moves from one random arrangement to another.
However in our minds we appear larger than we really are. Since a human being can think and imagine the view is very different from what really happens. Each of us sees the world slightly differently. In our eyes we are the center of the universe. We feel that the world revolves around us.
But in reality, each of us has really only a finite influence on each other. This influence can perturb the system only slightly. Mankind just transitions to next random arrangement.