I just had a thought lads
> Be Earthling
> Tectonic activity results in continents geographically separated by massive bodies of water
> One group of early humans fucks off to the Americas early across the bearing strait, gets isolated from the rest of humanity for thousands of years
> by the time contact between the old world and new is re-established, European diseases have developed to the point where they lay absolute waste to the American natives, so now we know to be careful with non-contacted tribes in the Amazon, etc
> Be alium
> Little to no tectonic activity on planet Beirfna, all Beirfnans live together on one massive pangea-esque supercontinent in close proximity
> no concept of cross-population contamination of people without immunities
> One day, the Beirfnan Space Agency makes radio contact with another sapient civilization on a planet they call "earth"
> Excitedly organize deep space missions to make first contact with our Earthling Bros
> Upon arrival, we shake hands, and our diseases immediately begin to mutually rape each other's populations
> Beirfna wiped out by Coronavirus in 3 Earth months
