The first large human settlements in the Near and Middle East from around 10,000 years ago were often decimated and sometimes destroyed by the diseases caused by the build-up of the wastes. Hunter-gathers left their parasites behind as they roamed. In the Black Death, millions died as the huddled in churches praying to God. Now Ebola thrives in dense, unhygienic settlements but it also spreads across the world on the trail of jet-plane journeys. Like the rogue alien plants, animals and their diseases that are causing environmental havoc world-wide, human diseases now hitch a ride on human mobility. Nowhere to hide.
I'm a writer whose interests include the biological revolution happening now, the relationship between art and science, jazz, and the state of the planet