KING - Electrical Power Source

Chess King is the commander in chief of armed forces. All pieces obey "thy king's command". The original chess game contains "military theme"
The King factor can be converted to any form
A King can be a family leader - the father. Queen - mother. Bishops - children etc. The pawns - friends.
A king can be CEO of a company - the employees - chess pieces
A KING in any field is something that is very important without which others cannot function.
THE MOST IMPORTANT FACTOR OF THE EXTERNAL WORLD OF HUMAN CIVILIZATION IS ELECTRICITY. IT IS THE KING WITHOUT WHICH THE EXTERNAL WORLD WOULD CEASE TO EXIST NOW. No electricity, no lights, no fans, no televisions, no cell phones, no laptops - nothing of electricity would function. It will be a "total freeze" of human civilization. For the monks of inner world, electricity and its power over them is zero.

Electric power grid failure - millions of electrical components in connecting cities, states become non functional.
Imagine King to be an electric source. When the power is shut down at the mains in a home - all components become non functional, they don't work. Somebody shuts down the mains power - the television, refrigerator, grinder, lights, fans don't work.
When there is no current, all electrical components don't work. They become inactive.
When fuel in a fighter jet becomes empty, the jet will crash land. Here fuel is the most important - the king.
For a human, the king factor is "Life" which is most important. All others are secondary. Money, Society, Respect, Prestige etc etc. The most important is to be "alive"