Despite our best intentions, we simple humans find ways to make stupendously bad decisions. In most of these instances we have ourselves absolutely convinced that we have done these idiotic or egregious things for good reasons.
I like to write about decent people doing stupid or terrible things. (There's certainly no shortage of source material.) In much of our checkered history it's been the "normal" people who've committed a lot of the awfulness.
I think theatre is at its best when it helps us understand not What Happened? but Why It Happened, enabling the audience to understand someone else's seemingly incomprehensible actions. Understanding leads to compassion, which leads to peace.
And, when I can, I like to make people laugh.