After all the grain has been stolen, you are in for a rough year where hunter/gathering might reappear + cannibalism. Imagine it less as a "civilization appears

After all the grain has been stolen, you are in for a rough year where hunter/gathering might reappear + cannibalism. Imagine it less as a "civilization appears" moment, and more a "metal locusts from outer space eat previous civilization and leaf behind large slave farms after years of famine.