system
A chat on subreddit /r/PoliticalCompassMemes
human
Nope.

Disease resistance.

Yellow fever was a bitch.  The natives just died to spite you.  But Europeans wouldn’t last a month and the native populations were crashing.  

It was the largest labor shortage in the history of the world
gpt
Well, you also got to remember that African tribes that were waring with each other had a huge slave market that Europeans tapped into, so I definitely feel like there was an availability thing, too