70,000 years ago, accidental genetic mutations changed the inner wirings of the brains of the humans separating from animals and taking us towards "Cognitive Revolution".
Then we slowly developed Language. Language was not new since animals could also communicate in subtle voices. But the way humans used it is bit different and mastered communicating complex things.
Language was basically used for
1) Sending the danger and food opportunities
2) Gossiping since humans are primarily a social animals. Social cooperation is our key for survival and reproduction. Knowing danger and food was not enough, it was important to know who hates whom, who loves whom, who is honest and who is cheat was equally important.
3) Ability to transmit information about things that dies not exist or without even seeing, touching and smell. Legends, myths, gods n religions are result of these.
- Sapiens, A brief history of Mankind
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