Even mud hut technology has advanced well beyond huts. The "greenest building in Pennsylvania" is a glorified mud hut with underfloor heating. It contains more than just one century of advancements over the most basic earthen construction.
And perhaps you haven't seen the sort of houses that people lived in, even as late as the 1930s, in some parts of the country. Let's just say there is a good reason why pre-manufactured homes are popular in certain places. Upstate New York may not exactly be a representative sample for the housing conditions in 1915.
https://en.wikipedia.org/wiki/Cob_(material)#Modern_cob_buil...
http://www.sotaconstruction.com/project_details.asp?id=42
Even mud hut technology has advanced well beyond huts. The "greenest building in Pennsylvania" is a glorified mud hut with underfloor heating. It contains more than just one century of advancements over the most basic earthen construction.
And perhaps you haven't seen the sort of houses that people lived in, even as late as the 1930s, in some parts of the country. Let's just say there is a good reason why pre-manufactured homes are popular in certain places. Upstate New York may not exactly be a representative sample for the housing conditions in 1915.