@TheWitchBitch @LaylaAlexandrovna Yes, thank you, I've heard that too!! That's definitely a big part of it. And what they keep repeating is that after the "back to sleep" movement became a thing, children took longer to hit milestones, thus creating tummy time! Except I'm wondering how often babies have slept on their stomachs? Because I read that in medieval times, babies slept on their backs swaddled up
They sure didn't do tummy time. I know it used to be encouraged to place them on their stomachs...but what about before that?

Because America has really strict milestone requirements. Like they need to be rolling by six months and if they're not you're not doing enough tummy time. But other countries will say that the milestone for six months is just rolling into their sides. Then I looked up and saw that placing babies on tummy time before they're ready is actually worse (I can link those if you're interested). Ahh I'm going on a big tangent I know. I'll write a whole post about it but my big question is why is tummy time so pushed when in the past babies slept on their backs and still developed fine? I want to find other country's milestones marker's and compare it to us. And the history of sleeping on back/tummy.