Chapter 8 reveals that languages change over time, with new variants developing and others going obsolete. This chapter aims, firstly, at giving the reader insights into the phenomenon of language change, which has resulted in a wide variety of languages spread throughout our planet that can be grouped into language many families that will be surveyed. We will ask why languages change and provide examples of changes that affect different parts of the grammar, with special attention to grammaticalization. We stress that languages are not getting better or worse as a result of these changes. While we see that under the right circumstances a language can “split” and develop into two or more different languages, attention is also paid to the fact that languages can go extinct. With that general background, we can ask whether the study of language change has resulted in an argument that could support the Innateness Hypothesis for language. To this end, we will ask whether there are certain properties of languages that are immune to change and if so, whether this can be explained if we assume that these properties are anchored in the innate system?