Solaiman Akbar Posted 12 months ago What is the advantage of evolving the ability to cry? Expression of emotion plays largely in the social intelligence of humans. Bottomline: crying has many different functions , so that means the ability to cry isnt simple. It is very hard to comprehend humans losing tear glands anytime soon, unless we evolve into emotionless, electronic, metalloid robots!(they wouldnt have use for tear glands!) Therefore, the adaptation of the ability to cry is crucial for humans evolution and reign over Earth.