And Eru Smiled

[Nilpaurion Felagund]

But that's hardly an "ethical approach" as we would understand it, is it? (The Saucepan Man)

Of course. For Eru to "ethically" cleanse evil from the world, he would have to destroy it. Rather, in his Ethics, he allowed Melkor's music to merge with his themes, instead of destroying him right then and there. I could not understand why he did so, considering there is no eternal life or punishment that we know of in Arda.

Instead of uprooting evil with a force of violence he moved on with his plan, but he used Melkor's discordant themes to improve the Ainulindalë.

So there. The Ethics of Eru's passivity. Personally, I would be scared for Arda if Eru is not passive. Remember what happened to the Flat Earth Theory?