Our language evolved as a way of gossiping. According to this theory Homo sapiens is primarily a social animal. Social cooperation is our key for survival and reproduction. It is not enough for individual men and women to know the whereabouts of lions and bison. It’s much more important for them to know who in their band hates whom, who is sleeping with whom, who is honest, and who is a cheat.
Harari, Yuval Noah (2015-02-10). Sapiens: A Brief History of Humankind (pp. 22-23). HarperCollins. Kindle Edition.