No Markers

Some people create a mark with their existence. The mark could be negative (as in the case of Osama Bin Laden or Hitler) or positive. Small or big.

There are others who don't leave any marks anywhere they go. There are few signs of their having existed. They also seem to make efforts to obliterate any signs that might have been inadvertently made by them. They live life trying to be inconspicuous as though they were a KGB agent who has come to USA.

What do these people live for? What is their aim in life? They obviously don't exist to make any changes to people around them or to society in general. They exist only for themselves. And if they happen to do something nice, it is because they derive extreme personal satisfaction from that act. Anonymity is something they hold on to as though it were their dear life. They seek few things from society and contribute little. Society is as important as a vending machine. Something that is needed but one doesn't socialize with a vending machine, right?

These people are very happy to have a low balance sheet in life. Low assets, low liabilities. They live life as though they are constantly ready to depart - everything packed in a suitcase and ready. They shun use of assets in any form, especially intangible assets like friendships, goodwill, contacts.

Just as any object seeks a low potential energy, such people constantly seek low interaction levels. To use a cliche, they find solace in solitude. 

Like a thermostat that maintains the temperature within a range, they maintain everything within limits. When their interactions with their outside world reaches a certain level, the internal thermostat kicks in. They forcibly bring the outside interaction back to an agreeable level.

Such people are best left alone. One shouldn't get too close to such people.