/lit/ - Literature

How do I convey a philosophical/moral argument through a dramatic narrative?

I know not to have dialogue actually addressing the theme explicitly and I would rather not have each character wholly personifying the extremes of each of the conflicting sides. Any tips or particular methods for a more nuanced approach? Ideally I would want to be able to see the expression of multiple perspectives on the same individual for most of the main characters and have it be more of an impartial demonstration of the subject that raises questions rather than preaching my own beliefs as the correct take on the matter.