"I'd expect that to solve some problems but not all of them. Mostly it's an issue when the more advanced humans want to colonize a place that is already inhabited by less advanced humans."

Nod. 

"This is getting to be an impressive to-do list and I bet there are things we're not thinking of because there's just so much; I'm going to take a break. Which means you might not see me for five years, technically, so write if you need me -"

"Of course. It is nice meeting you even if everything is terrible."

"We'll fix it."

"Yes we will. - will the war crimes courts need to handle lots of 1802 slaveholders -"

"It's not really a war crime."

"Right, fair, but should we be establishing courts or something for people committing atrocities that are considered everyday in their time period but which objectively should disqualify them from membership in civilized society at least until they figure out it was wrong -"

"Figure it out independently or acquiesce to a change in zeitgeist?"

"I am trying to have very low expectations here, but would you feel comfortable being neighbors with a slaver who had  - acquiesced - to this being no longer acceptable - would the people he or she enslaved -"

"I mean, I was not there, but my understanding of Revelation history suggests that people did exactly that and that freed slaves frequently went on working for their owners under slightly modified terms. They didn't have great alternatives, mind, but they still did it. Also there are lots of people who paid lip service to knowing it was wrong but did not actually manumit their slaves."

"Well. I guess as long as we give them better alternatives."

"It's probably better for the slaveowner not to be isolated until he or she grows up, even if, should no one want to be his or her neighbor, we could hardly insist."

"Pretty much exclusively he, for what that's worth, Muggle women can't own property."

"I don't think that's true across the board, I remember something about George Washington freeing all his slaves in his will but this not affecting the ones that belonged to Martha."

"Those are colonists? Yeah, don't know about there."

"My history education was skewed towards the context from my lifetime, yes."

"I know they fought a war and handled the aftermath much more neatly than France, and I briefly looked into why it went better afterwards and decided it was complicated -"

"How often do human societies fight wars?"

"All the time? Maybe we're better by 2179."

"They space out more but the nature of warfare changes a lot with technology."

"I think I might take a break also. Can we sing outside -"

"Yep, there are a bunch of Elves already doing that."

"Lovely."

Elves go outside to sing.