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I would look for a compelling moral conundrum that serves as the climax to the epic journey, and the very core of the schism between the two. All you really need is an act with no clear right/wron...
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Source: https://writers.stackexchange.com/a/29447 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#2: Initial revision
I would look for a compelling moral conundrum that serves as the climax to the epic journey, and the very core of the schism between the two. All you really need is an act with no clear right/wrong, and I tend to think that something that can be split according to the logical solution and the emotional solution should resonate. For example: Hero A meets and falls in love with Love Interest Z. At some point, Love Interest Z becomes a host for Demon/Parasite/Entity Y, which has the power to destroy the world. Both Hero A and Hero B realise this. Being an objective outsider, Hero B acts to kill Love Interest Z, nullifying Entity Y and preventing the destruction of the world. Hero A now hates Hero B, believing their must have been a non-fatal solution. That's probably too narrow a scale, but it might get you thinking. If Love Interest Z is a beloved public figure, than perhaps that's enough to escalate to a civil war. If not, maybe consider Love Interest Z as an entire city of people - quarantined and annihilated for the greater good. Metrocide (is that a thing?) seems pretty evil, but if it's the alternative to omnicide? Well...