Disease travelled through connected worlds

After 1492, pathogens including smallpox moved through American trade, war and migration networks. Communities with no prior exposure suffered repeated epidemics, while invasion, displacement, hunger and forced labour made vulnerability worse. Disease was therefore not an invisible conqueror acting alone but one force inside a violent colonial sequence.

Timing and mortality differed sharply by region, and estimates remain contested where records are thin. The mechanism is nevertheless clear: germs moved along human connections, then political disruption changed who could recover. Explaining demographic collapse requires both biology and conquest, without turning either into a complete story.