The concept of a king or chief, I believe, is as old as the concept of leadership & so, perhaps, is older than humanity itself seeing as many animal species have leaders. As the human population grew, empires began to form &, thus, emperors. The king (or emperor) was a man who sat around the fire to discuss the land & settle disputes with his advisors (early parliament & government) in antiquity. The king led his soldiers into battle as the monarch of his nation. The king entrusted certain people to ensure the tribe has water & crops, he would gather the best hunters to hunt for meat if there were no domesticated livestock, these were early ministers of agriculture & water security. The king would choose certain men to lead certain regiments (his commanders & generals). The role of a king was very hands on & advanced unlike the largely ceremonial figures we seem to have today. If the king grew distant from his people, the people would get rid of him...