Lumescant

Lumescant is a world of knowledge.

Society
Lumescant's social structure is stratified by knowledge. The more you know, the more power you have, and vice versa. Lumescant is the most ethnically diverse of the worlds, but unlike the other three, the people do not separate themselves into tribes or clans They are more of a melting pot of cultures and people  Lumescant is also the most influential of the worlds because of their technology  Being the most "advanced," they have goods everyone else wants, meaning they trade the most with the other worlds  They created (established?) the "universal" language.

Lumescant also has the most dense population of the four worlds, though it is not the largest world physically.