Anonymous wrote:i think it might've been b/c we are also taller and have access to better nutrition at a young age so our bones grow bigger. Like Audrey Hepbournes' svelte form was b/c of starvation through the war.
We think that everyone was eating meat, veg & mash everyday but roast chicken/beef was a Sunday dinner thing. even if people did eat meat everyday, it was a very small portion or maybe a stew. Lunch would be a cheese sandwich and an apple an a glass of milk when you were a kid with maybe a cookie or graham cracker. Maybe a slice of baloney and 1 slice of lettuce. being able to eat to bursting at every meal all year around became available to the baby boomers when the war production machine switched to producing food for americans. Baby Boomers aren't particularly thin. Before WW2 most of the population was rural. Also, this is something people don't realize but I have lived with live in help- when you have help, gardener, maid, driver etc . . the menu is planned and you get a set meal at a set time and teh rest gets eaten usually by the helpers or whoever comes round to do something that day, like my grandmothers house has terrible plumbing so the extra slice of dessert we didn't eat at tea would get served to him. Whenever I was at my grandmothers' homes I would always lose weight even though wed get a proper fried breakfast, lunch, tea and a very late dinner. So even wealthy americans wouldn't be able to just eat 'at will' but would have to eat at the appointed times. A lot of kids didn't get sufficient calories to grow to their full potential- just like europeans. They all thought the american soldiers were so tall but now all those nationalities are much taller than the average American is.
This. Obesity aside, poor nutrition in childhood can affect your frame, not just your weight -- people are smaller and shorter if they are not getting necessary nutrition in childhood. People ate less, and food insecurity was more common. It's not about human genes evolving (which is unlikely to happen in only 50 years), but about the conditions affecting whether or not people reached their full growth potential.
Also, women in the early to mid-20th century wore very restrictive undergarments to achieve that figure -- corsets, girdles, etc. Their waists were tiny, in part, because they restricted them every day. Women in the 19th century actually warped their ribcages by tight corseting.
Also, historically speaking, women would tend to be wider in the hips and bust. Tiny frames and skinny bodies are not optimal for surviving childbirth, or for surviving in conditions where there isn't a regular supply of nutritious food. It's only recently that our ideal of beauty has been very thin.