Standard Fantasy formula my guess. Also bronze age/iron age societies heavily practiced slavery.
To give but one example, Khor'minos is explicitly modeled on ancient Rome and thus shares the endemic slavery.
That is entirely dependent on you.
Historicity, as PT and Wolf have said.
Probably for the best. Not what the game is about despite being a part of the lore.
He probably thinks that slavery is in the banned content list, or in Patreon's community guidelines for what isn't allowed in sexual content (since that informs what isn't allowed in CoC2). It isn't in either the banned content nor the community guidelines. I don't know of any place in which it's been said by someone on the team that slavery or participating in the slave trade wouldn't be allowed. In fact, in the coc2 channel of the discord, I saw this said by Savin:
Based on this, you could, perhaps, say that we won't be getting the ability to participate in the slave trade, because of the too much work thing, but I feel like some limited form of it would still be allowed, where there's a few npcs written to be slaves and potentially bought by the Champ. Since, the thing that's too much work is an entire feature/system with "semi-procedural" characters. If some writers were to write some slaves, and submit them as npcs, they may get accepted, given that they're not on banned content.
Anyone can write something, and submit it. If you happen to be planning on writing something, I recommend going to the Event Submissions part of the forum and reading all of the pinned threads (note: there's a lot of words there). There's a lot of valuable information for writing a submission. As for the actual submission, the bottom of the Event Writer's Guide thread has a link to a google survey thing in which you can submit a doc containing the work, or you can post a link to the doc in a thread in the Event Submissions subforum, with the thread title starting with "[Submitted]" and message Savin about it. It then gets reviewed, and if it passes the review, it gets passed on to the coders.
I recommend just using the Google Form. That way, it goes right to the review queue via Balak.
Ehhhh, the only thing is, is that all my talent lies in reading and narrating, not writing.
I take it that paying others to write content isn't a thing?
I'm fairly certain that there are several writers for CoC2 and TiTS who accept commissions to write characters. I don't know who does, except for BubbleLord, who's content "hub" includes this line: "If you would like to commission something, please PM me to discuss it and the price. Do not post about it here. This post holds a catalog of every submission I have and its current state." There's almost certainly some others who would take commissions, you just gotta find them if you want to.
There's several possible methods, but they all boil down to "have some npc who you buy them from"
Whatever floats your boat or you want to write. I have some idea for slavery content since it is my jam, but it is way down the line.
Yeeeaahh, like I told Tide, I have no talent in writing so I'm just gonna have to pay someone to write such content lmao