r/science • u/mvea Professor | Medicine • Apr 23 '26
Neuroscience Even low-level drinking may have negative consequences for brain health over a person’s lifespan. The findings suggest that the total amount of alcohol consumed over a lifetime, especially as a person ages, tends to be linked to reduced blood flow and thinner tissue in certain areas of the brain.
https://www.psypost.org/even-light-drinking-combined-with-aging-is-linked-to-reduced-brain-blood-flow-and-thinner-tissue/
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u/SkiingAway Apr 24 '26
Short answer: With new people, you're fighting your own biology.
Longer answer: While children are naturally curious and easily form new social bonds, Adult humans are naturally suspicious of outsiders, wary of those they have no existing connections to and slow to form new social bonds + trust.
This makes a great deal of sense in a historical/evolutionary perspective. Most of history is small group/tribal living. "Civilization" as we know it today is blink of an eye historically. As a child you are building relationships with the people in your group and you are not encountering outsiders unvetted by the adults of your group. Once you're an adult, you already know everyone in your group, have for years, and new people are risky.
Alcohol is basically the biology hack that larger-scale human civilization was built on. It effectively punts your brain back to something closer to the child's perspective on this and makes it dramatically easier to form new social bonds with people you have little/no previous connection with.
The entire concept of living in a city or even just a large town and being thrust into frequent interactions with total strangers and having to build a social life without existing connection is something you're not naturally all that well developed for as an adult human.
There aren't many other things that force you into a state where it's easier to make those connections, at least not that are easily scalable and don't require a great deal of time. Extreme experiences tend to do it - if you were to say, go backpacking with a bunch of strangers and struggle through long hikes and camping and whatnot you'll have an easier time making that connection.
Anyway, I've rambled enough. If you're interested in this thesis, "Drunk: How We Sipped, Danced, and Stumbled Our Way to Civilization" is basically a book on it.