First of all, many types of beer were historically not boiled. Quite a few still aren't. The mash, however, pasteurizes the beer.
That, however, doesn't last forever. In the conditions of the 18th century or whatever, microorganisms will get into the beer after mashing/boiling, so the heat treatment only helps for a while. The fermentation really does protect the beer afterwards, but it's a combination of low pH, alcohol, low oxygen, little nutrients, CO2, etc. Hops also help against gram-positive bacteria.
You're broadly right, but they were popular for most of the period we're discussing.
In continental Europe they were popular from roughly ~1000 onwards (see Behre 1999), in England from roughly 1500 onwards. In African and South American farmhouse brewing they're still not used. So it's a pretty complicated picture.
As the comment made clear, hops are only one component of what makes beer safe, though. Storable, safe beer for travel is documented already in Ancient Egypt.
The boil does kill the bacteria, but it's not preserved after the boil. At best it's as sterile as water; at worse it spoils faster due to the abundance of nutrients.
That's why it's kept sealed, under pressure. I wouldn't fill a water bottle and let it sit for many months before drinking it ever today. A beer bottle with CO2 atmosphere can sit for a long time.
There may be other reasons to prefer beer where the alcohol is relevant of course, just not for freshness. And freshness could absolutely have been relevant in the choice of drinks to load, together with low cost and acceptance in general.
Would technology that allows sealing of beer not apply even better to relatively nutrition-less water? Especially boiled water. Anything that can feed off of pottery + water or metal + water or glass + water is gonna take a lot longer to grow than basically any kind of familiar bacteria feeding off beer + any of the above.
> There may be other reasons to prefer beer where the alcohol is relevant of course
I imagine these are largely the same reasons people drink beer today. Spoiler: it generally ain't hydration or avoidance of disease.
First of all, many types of beer were historically not boiled. Quite a few still aren't. The mash, however, pasteurizes the beer.
That, however, doesn't last forever. In the conditions of the 18th century or whatever, microorganisms will get into the beer after mashing/boiling, so the heat treatment only helps for a while. The fermentation really does protect the beer afterwards, but it's a combination of low pH, alcohol, low oxygen, little nutrients, CO2, etc. Hops also help against gram-positive bacteria.
Hops weren’t that popular until the 1400-1500s (or not used at all in some places like England) though
You're broadly right, but they were popular for most of the period we're discussing.
In continental Europe they were popular from roughly ~1000 onwards (see Behre 1999), in England from roughly 1500 onwards. In African and South American farmhouse brewing they're still not used. So it's a pretty complicated picture.
As the comment made clear, hops are only one component of what makes beer safe, though. Storable, safe beer for travel is documented already in Ancient Egypt.
The boil does kill the bacteria, but it's not preserved after the boil. At best it's as sterile as water; at worse it spoils faster due to the abundance of nutrients.
That's why it's kept sealed, under pressure. I wouldn't fill a water bottle and let it sit for many months before drinking it ever today. A beer bottle with CO2 atmosphere can sit for a long time.
There may be other reasons to prefer beer where the alcohol is relevant of course, just not for freshness. And freshness could absolutely have been relevant in the choice of drinks to load, together with low cost and acceptance in general.
Would technology that allows sealing of beer not apply even better to relatively nutrition-less water? Especially boiled water. Anything that can feed off of pottery + water or metal + water or glass + water is gonna take a lot longer to grow than basically any kind of familiar bacteria feeding off beer + any of the above.
> There may be other reasons to prefer beer where the alcohol is relevant of course
I imagine these are largely the same reasons people drink beer today. Spoiler: it generally ain't hydration or avoidance of disease.
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Sealing liquids user pressure on a large scale wasn’t really feasible back in those days though. They were just generally kept in wooden barrels.
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What exactly would happen if I kept water in a sealed glass bottle and drank it after a year ?
Yes and ancient Greeks and Romans already knew that boiling water somehow makes it safer to drink.
Yet people continued wasting resources on time on making beer and similar drinks due to whatever reasons..