The individual is sovereign

Man is a rational animal, and reality dictates that to survive, man must be rational -- by choice.

Man is a being of free will. Man can choose to think, drift, or evade -- but choose he must. His thoughts determine: his character, his values, his emotions, and his actions, and so his thoughts determine his destiny.

As reason is solely the attribute of an individual, and man's thinking determines his choices and actions, then each man is the master of his own destiny. The individual sovereign.