[Ninjaed, or at least interjected, by two posts, while editing, re-editing and probably removing most of the original relevance... Take it as you will, I'm not sure it reads quite as orderly as originally intended.]
I can see all kinds of interpretations of "Good", in the recent history of this thread. (In this way I suppose the argument to escape "Good/Evil" and head towards spheres might well be justified.)
One of the least touched-upon concepts (although the very last post might well have done so, I'm not familiar with that particular work) comes from "History is written by the victors". Not at all wishing to invoke Godwin's Law, but WW2 was won by the Allies and we can see what nasty Germany did (and yet we complain about Dresden), but had it swung the other way then the resultant Nazi-based society might have considered the Axis to have been in the right, with perhaps the barest social conscience concentrating on something other than the concentration camps, which are considered just. (Or not. See the book Fatherland.)
Good has also been compared to life-sustaining/re-animation effects. Which, interestingly enough, is also something that the zombifying regions manage, albeit that the manner of the effects are not considered universally conducive.
Then there's Good as equated to Lawful (although the Lawful/Chaotic axis is considered perpendicular to the Good/Evil one in many considerations). This may or may not be separate to the Liberal/Totalitarian axis, although the perspective (and possibly the position of the observer in this society) dictates as to whether Liberal==Good (freedom) or Totalitarian==Good (nurturing), respectively leaving Totalitarianism as a despotic evil or Liberalism as an anarchic mess.
Of course, Good as moderation with Evil as extreme (imagine "You will live as long as we can keep you on life support" or "Nobody shall be allowed to live beyond the age of 30", both evil in their own way). Even mere cotton-woolling. Is it better for society to freeze all development at the point of Utopian ideal? Is it better to live under the tight yoke of a (self-described) 'benign' dictator than to have any ability to make mistakes or be a problem to others? So many different ways, most of them interconnected and sharing synonyms, and yet also could equally be associated via antonyms, in a mutually-exclusive manner.
All this, related to DF, means you're going to have a multitude of interpretations. I still rather go with the idea that Good (in DF terms) equates to Life-Affirmation, indiscriminately and with no thought to whether this is going to cause problems to anyone else. But variants like that which include environmental retribution to those who take life (everything from killing invaders to treading on the grass!) are possible.
But I can see so many other ways of doing it. Could an individual be 'tied' to the land, and all those who disfavour them (or are actively against them) find the elements of the environment to be hostile? The same elements that are utterly benign to those that do not fall foul of the power structure? A calming environment might well be governed by a 'monster' whose vapours cause pacification of those that encounter it (to the extent of terminal lethargy/death through procrastination?). And while there are so many ways of discussing "Good", I think tying it to that word is going to give argument.