Detective Mystery 2013, on 14 February 2013 - 04:54 AM, said:
That's a common misconception. Heights fluctuated over the years. Both men and women were taller before the advent of agriculture. They were a bit taller than modern people. Men were around 5'10, and women were around 5'6. Both genders shrunk about four inches when cities entered the historical scene. Even after that, heights fluctuated. For instance, European men in the Dark Ages were surprisingly tall while poor people during the Industrial Revolution were surprisingly short, especially in the UK. The height gap between rich and poor was the greatest in the historical record in the UK during the Dickens era. For instance, upper class children dwarfed lower class children in much the same way that Dutch children dwarf Guatemalan children. The height difference was that dramatic. It demonstrated that diet (protein intake) was key.
Boy the Japanese have sure gotten tall, and I notice a market increase in height of children compared to their elders in Vietnam. The theory here is that it has to do with calcium, and, since everyone here wants their children to be tall, they constantly stuff them with ice cream (and most of the kids don't object). I point out that sardines would do as well, but that doesn't go over, unless its on a pizza.