Paraphrasing:
The first one is referring to the lack of communication that led to conflicts and wars, and it states that only because the lack of communication they took place, which is not entirely true, because most battles took place solely because people wanted more land and more power.
The second one talks about dead languages, and how they affect the world (the human society in this context) and how they ‘lose a piece of its (their) ability to survive’ which means that as a language dies, so does the culture it belonged to. So yeah, this statement could be true. People need culture and history to not repeat their past mistakes, so they do, in fact, lose a part of their ability to survive.
Explication step by step:
Paraphrase (en) = interpreteaza (ro)
You have to explain which one of the quotations is true from your point of view, while giving valid arguments for your opinion.