This is a flag that is not artistically pleasing, but one that demonstrates the idea of an benevolent type 1 civilization. The four colors of humanoid silhouette represents diversity and the embracing of diversity and tolerance - be it nationality, ethnicity, religion or lack of thereof, political opinion, artistic sense etc. The arrangement of the silhouettes represents cooperation, strength in unity and the willingness to protect and take care of of our common home that is represented by a symbolic globe behind the silhouettes.
The number of silhouettes can also be a symbol of the fact that no matter in what direction (N, S, E, W) you go you will always encounter the basic values shared by the nation's citizens.
Please note this symbolism would need to be further refined to look nicer, I just gave an idea :)