A theory that Language is not invented by humans rather it is an instinct that was being developed with the time. Many people have bad grammar and language and so have the new born kids are unable to speak. So there must be an instinct of language that is inbuilt in the humans and developed as they grow.
Diagrams
Originated from/Coined by
Steven Pinker
Further Reading/ References
https://en.wikipedia.org/wiki/The_Language_Instinct