Why do I think anyone should learn a foreign language

Hi everybody
I wrote a short entry about my opinion on learning a foreign language.
I would very much like to receive your opinions about my passage, your own opinion about learning another language - what drove you to do so? And of course, whether I made mistakes in my writing, I'd like if you could correct them.
A big thanks in advance.

My entry:
In my opinion every person should develop skills at language-learning. (develop their language learning skills/ skills concerning language learning.) 
Firstly, many people love to travel around the world.
While travelling, a person gets to know a new society culture, new viewpoints, and a new language.
In order to adjust as quickly as possible to the new envvironment, first we have to communicate.
Communication is made by several ways: we can make eye contact, we can express ourselves with body sings (body language and gestures)and can point at the things that we want but we will never be able to reach a full communication without speaking the vernacular.
Another advantage is the process itself - by learning a second language we develop our intelligence, exercise our brains and cause ourselves feel useful. (we make ourselves feel useful)
In conclusion,learning a foreign language is an end in itself and high-value goal that everybody should adopt to themselves. (that everyone should take upon themselves to do, or adopt.)

Well done! and I agree