Why do we cry?
Empathy has been cited as a major reason. Without empathy people simply would not have evolved. It is our ability to care for others that created our skills to form tribes, build villages and hunt for game for the group.
Some experts feel that crying evolved along with our sense of empathy so that we could begin to feel for one another when we sensed vulnerability. Along these lines, it is thought that crying can show someone how vulnerable you are, so that in a way it is a smoke signal, literally, a “cry for help.”