Experts.
Subject matter expert.
People who think their culture is superior are usually called nationalists or regionalists. These people are usually xenophobic, unable to face anything or anyone that is different.
about how many people are in the world
Subordinate or the inferior depending on how you are using it
A captain's superior is typically called their commanding officer or a higher-ranking officer.
human resource
People who work in the GIS field are called knowledge workers because a knowledge worker is a person working in one of the information industries and the GIS is an information industry so knowlege workers work there.
The acromion process is the most superior medial aspect of the scapula. It articulates with the clavicle.
It's a little awkward. People tend to be proficient at something, like a sport or musical instrument or language. It's impossible to be proficient at all knowledge. You can demonstrate your proficiency at something, or demonstrate your knowledge of something. If you're describing a superior level of knowledge, then "expert knowledge" would make more sense.
Relates to the truth
Lake Superior is on the North American continent. There is no sea that is called the Superior sea.
Because it is the largest of the great lakes