Everyone knows that the desire for the perfect brew was indubitably the beginning of agriculture.
A hunter came upon a hollow in the rocky bed of a mostly dry watercourse where some grains had providentially fallen or blown into the water trapped there, starting a natural process of fermentation.
Needing a drink, the thirsty traveler sipped—and then sipped again. “YUummmmmmm. Og find something here.”
Presto, the wantering hunter became a novice brewer, looking to duplicate that wonderful taste and buzz. It didn’t take him long to figure out that he needed more grain in his pot than was likely to blow in by chance and so he began to nurture the magic plants that gave him the gift of the gods.
I would not be surprised if early agriculturalists traded beer for game from surrounding hunters.