> Take a tour through Fort Williams. There is a collection of clothing from the Revolutionary War. The baby clothes look like doll clothes, and the adult clothes look like they were for boys. Then look at the clothing in the Gettysburg museums. The people were taller then, but still about the size of boys.

I don't think that's a correct interpretation, see the explanation here [0]. Not quite the same situation, but likely a similar case. Are you sure the "adult" clothes weren't made for young boys or teens, or women?

[0] https://dyckmanfarmhouse.org/people-were-shorter-back-then-r...

I don't think your statement about short lives in colonial America is correct either, they had a low life expectancy like everyone else, but mostly due to a lot of childbirth deaths and young infant deaths. Surviving childhood gave you a good shot at making it to your 70s, which has been true for a long time pretty much everywhere.

> Are you sure the "adult" clothes weren't made for young boys or teens, or women?

Yes. I read the informative cards at the display. Some were for officers. George Washington was a giant in his day. Look at the short beds and low ceilings. Watch your head walking through a doorway!

As for the short colonial lives, I read an account by bone archaeologists who examined the bones of colonials and noted that they suffered much damage from overloading the bones and their age at death was usually under 40.

Just think about the hard work in making your cabin with a saw and an axe. Then a barn. Then fences. Then about the endless amount of firewood you have to chop every day. Then using a horse-drawn plow. And dig a well by hand. And so on.