It was caused by those Byzantine guys eating beef and bacon while driving around in their SUV’s.
Well i am sure all the chariot and cart horses farted.
"what urban existence in the past really looked like was in the garbage,"
Talk about, "garbage in, garbage out"! Future archeologists will say, 'they fell to climate phobia and transgenderism obsession'!
Couple of battles go a different way, the Roman Empire never falls, Islam dies on the vine, and/or remains geographically isolated, and, oh yeah, none of us are ever born. Dang.
No grain, rats, and fleas. Same as the Black Death. (Same bug.)(And Wiki says it may have killed up to 13 to 26% of the population.)
There is a theory that cooler temps were involved in the Black Death. Cooler temps pulled the rats closer into humans.
Geology shows us the planet warmed and cooled even before humans existed.