alternatehistory.com

It seems that every large civilization cannot get enough salt - it was a valuable resource up until the modern age. but today, salt production is very simple and effective thanks to - in part - the evaporation pod, which removes the necessity to mine the salt. my question is this - why did this things not exist in the past (and if they did, what really changed)? what if a Mediterranean civilization like Rome or Greece invents this? could they counter the power of eastern spices with western salts?
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