Sometimes you're trying to justify things existing in your world, and you come up with a single explanation that covers a bunch of results and it is elegant and feels satisfying.
In my alternate history world (see my profile), I wanted to let African and American cultures thrive, not be colonised by Europe.
I wanted transatlantic contact to be contact between equals: West Africans + East Americans + far West European barbarians (distinct from the imperial core in Central Europe) all come together and ally... it's not exactly a lovefest but they see their common interest and create technology-transfer and confederation.
In actual history, one reason America was wiped out was the West lacked immunity to smallpox.
Then I learned a little-known historical tidbit (learned it on Hexbear iirc).... Africans had knowledge of smallpox inoculation! Therefore, if Africans were respected allies that crossed the Atlantic (not slaves), they could bring the Americans smallpox immunity:
- https://en.wikipedia.org/wiki/Onesimus_(Bostonian) – Onesimus (late 1600s–1700s) was an African (likely Akan) man who was instrumental in the mitigation of smallpox in Boston, Massachusetts. He introduced the variolation method of inoculation, which prevented smallpox and laid the foundation for vaccines.
- https://en.wikipedia.org/wiki/Smallpox_vaccine – Variolation was also practiced throughout the latter half of the 17th century by physicians in Turkey, Persia, and Africa. In 1714 and 1716, two reports of the Ottoman Empire Turkish method of inoculation were made to the Royal Society in England, by Emmanuel Timoni, a doctor affiliated with the British Embassy in Constantinople, and Giacomo Pylarini. Source material tells us on Lady Mary Wortley Montagu; "When Lady Mary was in the Ottoman Empire, she discovered the local practice of inoculation against smallpox called variolation."
So in the alternate history, in the 1490s Europe crosses the Atlantic and rounds Cape Bojador, and a multi-ethnic confederation initiates contact with the Native Americans. It brings the knowledge of smallpox immunity to them, because that's a technology several Old World Cultures (but not white Europeans) had.
By making Africans equals in transatlantic contact, that simultanæously justifies why Americans weren't decimated by smallpox.
"it's magic, I don't gotta explain shit" is the single most helpful phrase in world building
Me in my notes: "okay the floating island of On-Kalmoth are able to float because the pulverized bones of the great bird king were infused in to the land during the scouring of dawn before the beggining of time, while the floating islands of the windlands operate on a completely different principle due to the veins of naturally occuring none magical cavorite, which allows them to continue to float when the anti-magic eye of the fith moon is upon the world..."
Me to my players: fuck if i know it's magic"
The eruption of the giant volcano that was non-colonialism non-genocide solution to having a continent wide mostly intact ruins full of stuff probably killed way more birds than that.
Why bother shipping all those raw materials, chemicals and minerals across the space between planets when you can just use various engineered bacteria to grow them in vats on location?
This also justifies the inclusion of various tubes, flasks and vials full of colorful goo that does stuff, a vital element of all science fiction.
