on Writers Helping Writers:

While there are many kinds of stories, most of them today are about a protagonist navigating a change or growth arc. In this model, the character undergoes a personal journey of evolution; they realize that their hurts, habits, or hang-ups are keeping them from success and, over time, adopt healthier responses and behaviors that enable them to achieve their story goal and become fulfilled.

Now, this isn’t a straightforward process. It’s a two-steps-forward-one-step-back journey that will require a lot of difficulties and poor choices before the character realizes the need for change. So, as authors, we put a ton of thought into planning and incorporating those conflict scenarios.

What we don’t spend so much time on is the second half of the arc, when growth is underway.

Once the character decides to change course, they’ll start moving the right direction. But they won’t always stay on the straight and narrow. Their old responses may be ineffective, but they’re comfortable and familiar. And change is hard. So the path to success (or failure, if your story showcases a failed arc) will be messy, alternating between forward progress and regression.

But growth should gradually be happening, and readers need to see this because it provides hope that the character could actually succeed. Luckily, there are many growth milestones—changes in the character’s responses—you can include in your story to show they’re evolving.