Why do some languages disappear while others continue to thrive?

Languages disappear primarily when their speakers shift to using a more dominant language, often due to political, economic, or social pressures. When a government mandates a single official language, or when speaking a minority language carries social stigma or economic disadvantage, communities gradually abandon their native tongue across generations. Colonization has historically been a major driver, suppressing indigenous languages in favor of colonial ones. Languages thrive when they have large numbers of speakers, strong institutional support such as use in schools and government, economic utility, and cultural prestige. Writing systems, literature, and media also help languages survive. Ultimately it comes down to whether speakers find practical and cultural value in passing the language to their children.