Well... that's what sets homo sapiens (allegedly) sapiens apart from all others: our quest to explore, to see the other side of the hill.
This keeps blowing my mind. I'd make an awful Paleolithic human.
1. Have the creativity of imagining that there's land beyond the horizon.
2. Having enough belief (or a source of certainty) to consider the journey.
3. Overcoming the fear of the unknown.
4. Having enough faith that you can make the journey alive, find provisions at the destination, and return alive to tell the message and inviting others to join you.
And have the skill to perhaps fish on the way, and enough water or stamina to go without it. I couldn't feed myself in the wilderness even if had been given a loaded shotgun to shoot a dormant elephant at close distance.
edit: Also knowing that you won't just fall off the planet once you reach horizon - fact that we seem to be slowly forgetting.
