It’s not the best episode, but it does have a good debate about the Prime Directive.

Picard: So we make an exception in the deaths of millions?

Pulaski: Yes.

Picard: And is it the same situation if it’s an epidemic and not a geological calamity?

Pulaski: Absolutely

Picard: What about a war? If generations of conflict is killing millions, do we interfere?

Everyone: …(crickets)

Picard: Well, we’re all a little less secure in our moral certitude.