If the germ theory is relatively new, how do they think fermentation was happening (like wine, ale, yogurt etc.) thousands of years ago?

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If the germ theory is relatively new, how do they think fermentation was happening (like wine, ale, yogurt etc.) thousands of years ago?

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Thanks to modern science we now have this cultural drive to try to explain in rational terms everything that we observe. You see something curious and you automatically start to think how it could have happened. You make theories, you discuss with other people, you look for more information, etc.

But for a long time in history this mindset wasn’t the default. There were too many unexplained events happening and too little knowledge and tools to study them. There was also no urge to do it. Instead, it was more natural to accept things as they are and not ask questions that couldn’t be answered anyway. God knows best. Ancient philosophers and medieval alchemists were members of the higher layers of the society – they had time and resources to ponder those questions, but often they treated it as a hobby and were coming up with fantastic theories instead of something resembling science. Those who really tried were few and far between. So even though we know about people like Archimedes, Galen, or Avicenna, who were rigorous in their studies, their methods didn’t get popular recognition. That changed only fairly recently.

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