"Yes. Humans are a brutally war-faring species, and have used them twice."

"Twice in the same war, seventy years ago. Don't scare the poor guy."

"And it didn't, I dunno, irradiate your whole continent?"

"Ah, we have multiple continents, and even then it only was dangerous to a couple of towns and their surroundings."

"We have, like, three landmasses or something – the main one, and then you have temporary and less-temporary ice bits around the poles." He sighs. "Well, it's good that it didn't cause huge damage, in that case. I don't think I got to see Earth – you got distracted by the lumen and then I didn't get to asking about it."

Bar provides maps. "Here is where they detonated the bombs. We're from here, which is also the country that built and deployed them."

"Are you going to freak out that it was during World War Two?"

"… No, I kinda expected that if you were still doing wars there would have been more than two? Unless it's just that it was the second world war."

"The second and last world war. We still have them, and had many before."

"Okay, so what, do you just have a bunch of small conflicts at your borders now?"

"It is not that simple? Often the issue is securing resources and strategic influence. There is next to zero conflict in the borders of the united states, but we deploy our troops to other parts of the globe," Fenris head tilts, "do your world doesn't have resource scarcity? It sounds like a pretty multiversal cause of conflict."

"… There exists trade, though – if we want something, we have something that they want, whether resources or labor, so we can usually get it. Or we can get it through some other group who got it from the first one, and usually not everyone is enough of a dick to each other that you can't just get it by proxy?"

"Sounds nice," says Martin. "Doesn't seem to work that way where we're from."

"There is trade, but various groups might not be satisfied with the terms of trading, others will want to monopolize the resources for power. What happens if someone can't get a resource in your world?"

"… It depends on what sorts of resources you mean, but usually if people 'monopolize resources for power' then they end up being traded with less. Which is usually not in their interests so they stop relatively quickly? And yeah, they might not be happy with the terms, in which case they need to find something else to offer if they are that desperate about having it, not resort to conflict really?"

"...And your world never had imperialism? Inequity of military capability such that one group could just invade and take people's stuff?"

"Not to the extent you seem to be suggesting, but when one group was more technologically advanced they didn't invade and take, or I dunno, maybe they did and the natives got wiped out or something and I haven't heard about it, that'd be pretty horrible, but now at least we're all about equal and we have agreements set up and stuff?"

"Well, there is lot of that, in our world, empires where a land subjugated another land, draining its resources and ending its culture or keeping it stunted. With after effects until this day even after the fall of the relevant empire."

"Huh, okay. … How big are these empires, number of people? Order of magnitude?"

Fenris retrieves some history books for help.

"What a cheerful conversation topic," Trevor comments to Martin and Felix.

"Yeah," shrugs Martin. "Oh well."

After a few moments, Itaruko declares, "Your world has quite a few more people than ours. Like, almost two orders of magnitude more."

"That does make the fight for resources to be less intense. I wonder if your species is less fertile than ours?"

"Wait your world haven't broke the one hundred million mark?"