What larger myth have we agreed to take our place in?

Welcome to week forty-two. The week, David reflects on myth, the myths he has known in the world in the context of the larger myth he has agreed to take his place in.
Excerpt:
As I drove toward the used bookstore section of downtown Chicago, I thought about the myths of the world I knew. I thought about classic myths of Greek gods and goddesses. Inwardly, on the screen of my imagination, I reviewed Arthurian legends and the myth of the Wild West that were so much a part of my childhood. I returned to the aspect of myth I encountered in the first round of Joseph Campbell’s books. I thought about the myth of America, the myth of Africa and of the Orient, as we know them in the Western world.
Jun wanted us to look at both the myth of the culture we were born into and our personal myth, which seemed closer and dearer to me after my time in Caravan. Perhaps it was the constant reminder that this pilgrimage in the horizontal world is only one of the places I live. My time in Caravan was placing everything in the realm of a myth I live. I concluded that taking responsibility for our agreement with the One that sent us is another way of defining the myth we agreed to embody. Jun asked us to consider what larger myth we agreed to take a place in. When sent to the horizontal world to embody a mission, is this then the embodiment of archetype and myth?
The Caravan of Remembering, Chapter 6, Life Mission - Individual, p.111