Princess Mononoke
I love how there was no real villain except for the hate that consumed each character. Every group (wolfs humans boors etc) was righteous in their own way but at the same time so blinded by hate they could not see anyone else’s point of view. Besides the main character who “saw with eyes unclouded”
Hatred causes people to harm each other. I think that’s the main message besides the obvious ties to saving our planet and nature.