?In the future, after only pockets of civilization have survived a worldwide famine, a young nomad will have to have to race against time to learn the lessons that his deceased guardian left for him, in order to defeat the rogues that are hunting him, without sacrificing his pacifism.?

In a post-Apocalyptic future, a young man must learn how to survive in a lawless world against rogues determined to kill him without compromising his pacifist principles.

"In the future, after only pockets of civilization have survived a worldwide famine" = post-Apocalyptic. That says it all for the purposes of a logline. How the world went to hell in a hand basket is not germane to the logline. And actually doesn't need much elaboration in the script. Consider the dialogue in"Mad Max Beyond Thunderdome" , Aunty's world history lesson:

"Play something tragic, Ton Ton. [Ton Ton wails on a sax] Do you know who I was? Nobody. Except on the day after, I was till alive. This nobody had a chance to be a somebody. So much for history. Anyway... Water? Fruit?"

The important point is what the MC must do in the aftermath to survive

Water? Fruit?