But this is how my brain goes in moments like this:
Me: OK, new idea, let's just write some notes--But this is how my brain always works. I've accepted that. The point is: I had to exorcise some ideas this weekend. But it's all good. And now, for real: full steam ahead on Shield of the People. And editing that novelette. And maybe something else.
Brain: Perfect. First step, understand what's happening in every part of the world as they transition from neolithic to early bronze.
Me: That's absurd!
Brain: You're right. It's neolithic to chalcolithic. Me: I don't need any of that! That's, like, 8000 years before this story would be set!
Brain: Well, sure, then: half-ass it. Just decide cultures based on your whim without any sense of historical build up!
Me: That doesn't--
Brain: I mean, if you want to just cheat, sure. Me: How is that cheating?
Brain: You have no idea what cultural or technological influence those two continents to the southeast might have.
Me: I don't even know what's there, yet.
Brain: Exactly my point. Cheating. So where were we? Ah, yes, neolithic era! Me: Wait, but I just wanted a---
Brain: You're right, that's still taking the easy way. First a common origin point of humanity-- just humans on this world?-- and then their diaspora to fill the world and the effects that has on megafauna and other natural life.
Me: No, that's... I just had an idea for a story with deiselpunk motorcycles!
Brain: Oh, is that what you want?
Brain: Then we're going to have to go back even further and figure out the Mesozoic equivalents to justify oil deposits.
Me: I hate you so much.
*- It's set on the island where Kaiana was born.