What is the role of communication in the life of society?

Primitive people did not know how to communicate, because they underestimated the capabilities of their body. We drew hieroglyphs on the walls. Today, a person arbitrarily refuses to communicate, replacing a live conversation with correspondence, emoticons. Communication is a source of information, a way of developing myself and knowing the world (at the institute, a student learns information by ear). Communication cannot be replaced by something else. The role of communication is primarily educational. If there was no communication, people would be like Mowgli.