eli5 How did people survive if babies cried how they do?

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Im not sure if the title made sense but how babies cry to communicate, did they do that in the like prehistoricy times. Cause I refuse to believe that people who were surrounded by bears, moose, just aggressive/kill you quick wild life, lived with screaming babies around.
*Youre in a mudhut*
Husband- Oh my god theres a bear outside
Wife- What do we do
Baby- WAHHHHHHHH
Husband and Wife- :/

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