civilization building

Here's the idea: PoD: Around 2000 BC, hunter-gatherers in the Papua Peninsula begin cultivating Sorghum propinquum, simultaneously acclimatizing it for the highlands and increasing overall yield, and by around AD 1 it becomes a fully productive grain, spread northward to the main Highlands...

Hello, all. Over the last year or so I've had a number of ideas for a timeline based on the emergence of an agricultural civilization somewhere within the desert west of the United States, most of which have quickly fizzled out but still bugged me in the back of my mind. I've written some essays...