The Snake Clan rose to become a leading human nation on Eternia. Its territory was also the site of Eternos, the capital of the unified government of Eternia. King Jarod was supreme Snake Clan leader before becoming the first planetary monarch of the world. It was a late-generation society of Ancient Ones.
The original Snake Clan territory (not including other human and non-human nations conquered or dominated by the Snake Clan) became the personal fief of Eternia's global sovereign.
After the reign of King Grayskull, the original Snake Clan territory and its citizens gained a degree of local self-government under hereditary nobles or elected leaders.
In matters of religion, the Snake Clan and its descendants were monotheists who regarded Eternia's Goddess as the One True Deity of their universe and the whole multiverse.