Not sure I follow. The letter is about clothes (not toys)... He talks about people (himself, others) having low single digits outfits (one set, two sets), not sure how this makes him a post industrial capitalism consumer. In 1800 BC, life expectancy was probably 25 and people worked from ages like 6 onwards. This guy was definitely not a commoner, and he only had one set of clothes, and wanted two good sets. I'm not saying that's good and that out kids are spoiled and should be happy with two sets of clothes, I just have no idea what you're trying to say.