I'm definitely a genius I know 6 languages how about you?
What languages? You must be, I only know one.
Language is definitely a development of many complex systems used to communicate.
Definitely, I've always found it interesting how languages have evolved over the years and how we learned to communicate with each other.
The very first language in humans has always been a discussion for many centuries.
Yes its incredible how we came from just using hand gestures and other ways to finally being able to speak and understand eachother
If we take a look at the origins of language you can only make educated guesses from other kinds of evidences to be honest. 
True, we dont really know how it came about. Its a very interesting concept through and through.