This is something I often have trouble with in my story ideas. You see, my older brother says that it's a REQUIREMENT that the protagonist has to change or learn a lesson in the course of the story, and whenever he criticizes a film, it's often due to the protagonist not developing the way he likes. (For instance, his problem with Beauty and the Beast is the fact that Belle is the same at the end of the film as she is at the beginning, and it's the Beast who grows and develops instead.) Anyways, that really discourages me with a lot of story ideas, like the dinosaur story I discussed here. Sometimes, I just can't think of something for the protagonist to learn that fits the story. I can sometimes think of something for the deuteragonist or tritagonist to learn, but not the protagonist. In the above-mentioned idea, I made a separate thread asking for suggestions on what Alex could learn, since I could think of development for Magnolia, but not him. No one replied, but I ended up coming up with one on my own. There are other ideas I've had, though, that I've had to abandon due to them being simple "protagonist saves the day" stories without the protagonist learning something or changing. Any tips for coming up with protagonist character development? Does it depend on the plot?