So I am sitting in a cafe eating lunch and there is this baby crying incessantly. The mother puts the baby in his pram and then starts pushing it back and forth rather quickly. Baby stops crying....

What do you think about modern babies "sitting still" far more than they ever did evolutionarily? I imagine a hunter gatherer baby would be on mums arm being walked around all day, etc. Much more physical "movement" even if their just being carried.

What you guys think? Pure speculation obviously... Possible discordance? (yes I have no kids)