Language can be used to promote individual expression. Personalities can also affect a people's culture. Gangs often create and perpetuate the use of slang words, which are sometimes integrated into the culture of the entire group. Certain words and expressions are used to identify members of a certain group and serve to build cohesiveness among group members. Language allows this expression through its ability to adapt to personal and group needs.
Language gives humans the ability to communicate the past, present, and the future.
A people's culture passes from one generation to the next due to language's ability to communicate the past, present, and future. This ability allows humans to live in a mythological universe and separates humans from the rest of the creatures in the world. For example, those who migrated to the cooler region in the above speculation would have had the ability to tell their children of their relatives due to language. They also would have had the ability to invent new words to fulfill their needs to talk about not only new plants and animals but also new ideas. Furthermore, in the United States today, citizens have the ability to communicate the future of technology because of language.