And if so; should we ignore it? negotiate with it? contain it? or defeat it?

...

...Defeat it.

nothing exists

EVIL IS LIVE
GOOD IS DOOG

I CHOSE LIVE

>>4
You obviously don't understand the marked benefits of doog.

>>1

All or several of the above, depending on what the situation calls for. An automatic, all-encompassing response ignores the complexity and shades of each situation.

"Evil," like any word, is in the eye of the beholder; to us, there is "evil," but it is not the same evil as it may be in other cultures, or simply in other people's minds. Because of this, we must be mindful of how we approach international situations/wars/crisis; to call someone, a regime, or a country "evil" would be to invite a response that lacks thought, and would therefore be potentially more damaging that the supposed "evil" we sought to eradicate/stop/etc.

tl;dr ignorance is the true evil

Evil is an artificial classification of the natural way of the world created by religiosity.

Such misguided concepts have no place in a truly enlightened society. GB2 the Dark Ages.

Evil is a rational classification of choices which cause suffering to sapient beings.

Such metaphysical concepts are the foundation of a truly enlightened society that is capable of going beyond scientific method to obtain the truth. GB2 the Dark Ages.

Shakespeare said it best:

"There is no such thing as good or evil, for thinking makes it so."