There are many species of life that are more than able to communicate, but humans have a unique form of communication. We are the only species capable of using language as a form of communication. Think about the first people and how difficult it would have been for them to communicate without language. From never having a single word to over hundreds of thousands of words in modern times, all the words that were created in order for people to communicate are a part of a complex system. It is a difficult concept to understand because we've been using language for most of our lives and all of these words have been in place for thousands of years. Language is something that is constantly changing, it's not an every day change, but it is gradually evolving. For the most part, language is passed down through generations so parents and children are able to communicate with one another. Changes in language have occurred throughout centuries over a short period of time and have evolved through different degrees of English such as old English, middle English, and modern English.