Faolyn
(she/her)
See, in a case like that, there's an easy compromise--rocks doesn't need all the land, and farms don't need all the land. They can share. If the rocks refuse to and think killing all the humans is the best way for them to be able to feed on sunlight, even though they're 12th-level druids with access to plenty of magic that would make the sharing possible and profitable for both--then the rocks are evil.In this scenario there's other sentient beings who might depend o those resources or like their way of life based on those resources.
Sentient rocks might be solar powered and use the land to bask in the sun humans want to turn it into farm.
Each rock is a level 12 Druid.
They're intelligent and sentient they are likely able to recognize the same in humans.
Yes, I realize that this scenario is likely just made up and you aren't planning a setting with 1-2 billion 12th-level druid-rocks, but my point is still valid. Unless this world has next to no land, then there should be plenty of space for these rocks. Do the rocks care about the weather? If not, then they have tons of space in the desert and at the poles (migrating between north and south) where farmers can't go. Depending on how big they are, they could even just hang around in regular human spaces soaking up the sunlight and not bothering anyone. We have tons of room for even big rocks everywhere.
If they choose not to, if they choose to still kill the humans when they really don't need to, then they're evil.
I don't think the locusts comparison is apt, because your scenario seems to have the idea that the aliens are coming to the humans, not the other way around. So the aliens would be the locusts.However complete alien mindset they may or may not have morality as humans see it. Eg humans may be a viable food source or seen as an invasive/destructive species eg sentient locusts.
If the aliens are intelligent, then no matter how alien they are, they should have at least some ability to understand that humans don't want to be eaten. Even if their own biology or culture tells them that it's OK to eat sentient beings, if they understand that humans are sentient and saying "no," then they should be intelligent enough to respect that.
(Question: is this some sort of roundabout way to get everyone to convert to vegetarianism?)
If it's because humans are tasty, then this would make them evil. If it's because humans are literally the only food they could eat... well, why are you, as a GM, using this scenario? And by D&D standards, that makes them evil.What humans see as good the other species sees as bad and/or a threat to their existence. They may or may not be right in that belief mostly for the sake of discussion. Wh they may have experienced the result of human expansion in previous ages or they can see the future.
Or they may just want to eat all humans regardless. More interested in people's thoughts of various scenarios on who is right or wrong.
All humans? Like every last man, woman, NB person, and child is a direct threat to this species? If so, how? I'm sure you could come up with a reason for it--it's a fantasy world, maybe there's only so many souls/animating forces to go around, humans and alien rocks have to get their souls from the same source for whatever reason, but humans breed so much faster that the rocks are literally no longer being born right or at all because of humans. But it kind of didn't sound like you were going for that. So if it's not something magical like that, how is every human a direct threat to them.So e scenarios I can think of.
1. Humans are a direct threat to their existence.
If only some humans are a threat, then it's evil to kill all humans.
Then it's evil, because the rocks aren't getting the full story; they're basing their beliefs on superstition or bigotry.2. Humans are percieved to be a direct threat to their existence.
As I said before, this is unlikely the case. All humans are literally in competition with each other for the same food and there's tons of food to go around (the problem is in distributing it fairly and affordably). Even if medieval fantasy world got a couple of billion aliens who could eat human foods, then there would be starvation due to the relatively low-tech farming techniques of the time period... but then these aliens should able able to contribute their own knowledge of farming to improve such a thing.3. Competition for resources may the strongest win.
4. Percieved competition for resources.
Then it would still be evil, because if they have the ability to kill off all humans, then they likely have the ability to fix climate change. Or are those 1-2 billion 12th-level druid-rocks all talk and no carbon scrubber, hmm?5. Long term threat not clear to most in present time.
6. Long term threat they percieve as real. Eg if on earth they can forsee climate change via human action. Or humans did cause immense destruction in the past.
Then, evil.7. Very alien mindset. They know humans are intelligent they just don't care or see them as a self aware food source.
Then, evil.Hell maybe they do everything humans do but are better at it eg expand faster consume faster.