Feliks, I'd push the character/action issue back to the Gilgamesh cycle.
it's a character flaw--Gilgamesh's penchant for riveting any woman who strikes his fancy--that sets the story in motion. His exasperated subjects appeal to the. gods to send them a champion to defend their wives and daughters and to teach Gilgamesh a bit of humility. The gods create a hairy savage, Enkidu, who wrestles the king to his knees.
Gilgamesh responds to his humiliation by declaring Enkidu his bff and abandoning serial rape in favor of mighty quests, with Enkidu as his trusty sidekick. In the course of one of their adventures they manage to anger a goddess, who retaliates by killing Enkidu.
Enkidu's death makes Gilgamesh aware of his own inevitable demise and he spends the rest of the story trying, unsuccessfully, to finagle a grant of immortality.
The change from arrogant bully to man obsessed with his own mortality is the story, for which the action is essentially a catalyst.
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