It's been the norm in the US as well. There was a time when it was more common for middle class Americans to have a stay at home parent, but it was never the most common case among all Americans {1}. It is only in the last several decades that parents have been demonized for not having a non-working parent (and this as real wages have been reduced for most people), but historically, the American family did not just have working moms but working kids (on the farm, baby sitting, running a paper route or as with my great grandmother in the button factor at age eight).

{1}: https://www.census.gov/hhes/families/files/ASA2010_Kreider_E...