@Jasper10,
...try for a minute to change the words good and evil by functional or dysfunctional and see how that changes the righteousness tone that you need and crave to make war on other tribes that do no share your group belief system.
...you see as soon as you do change and swap those words, the righteousness and the war between good and evil immediately fades. You are now on grey ground and have to work seriously to understand other tribes motives and reasons to act the way they do.
Funny enough most secular atheists still are bound by the idea of Good and Evil from the POV of agency and free will.
We don't say a storm or a volcano eruption is good or evil...it is. People are no different in the superorganism of their tribes.
The world is challenging with pain for a great deal of time in order to make scarce and valuable the small amount of time in which we found moments of happiness and self-fulfilment. There the problem of Evil has faded...
That is the rational of the Cosmos.