From Elizabeth GoodCloset [who wrote the "The History of a Cheap Dress"] a thought-provoking view that the pressures of mass manufacturing and production led to today's streamlined -- or dumbed-down, as she calls it -- uniform of T-shirts and jeans.
Who Put Americans in Jeans and T-Shirts?
http://www.etsy.com/blog/en/20.....-t-shirts/
"...“If you’re making large quantities,” she says, “you make a T-shirt or jeans because they fit the largest number of people.” Other factors were at play: with clothes being made on the other side of the world and planned a year in advance, only the safest and most profitable styles won out."
ETA: Author's name is Elizabeth Cline