The Karen (kəˈrɛn ), also known as the Kayin, Kariang or Kawthoolese, are an ethnolinguistic group of Sino-Tibetan language-speaking peoples. The group as a whole is heterogeneous and disparate as many Karen ethnic groups do not associate or identify with each other culturally or linguistically. These Karen groups reside primarily in Kayin State, southern and southeastern Myanmar. The Karen, approximately five million people, account for approximately seven percent of the Burmese population. Many Karen have migrated to Thailand, having settled mostly on the Myanmar–Thailand border. A few Karen have settled in the Andaman and Nicobar Islands, India, and other Southeast Asian and East Asian countries.
The Karen groups as a whole are often confused with the Padaung tribe, best known for the neck rings worn by their women, but they are just one sub-group of Red Karens (Karenni), one of the tribes of Kayah in Kayah State, Myanmar.
Karen insurgent groups, led primarily by the Karen National Union (KNU), have waged war against the Burmese government since early 1949. The original aim of the KNU was to create an independent Karen homeland called Kawthoolei, but since 1976 they have shifted towards calling for a federal system in Myanmar instead. Even so, the KNU has declined invitations to speak with the Burmese government.
Karen legends refer to a "river of running sand" which ancestors reputedly crossed. Many Karen believe this refers to the Gobi Desert, although they have lived in Myanmar for centuries. Most scholars dismiss the notion of a Gobi desert crossing, but rather translate the legend as describing "rivers of water flowing with sand". This could refer to the sediment-laden Yellow River of China, the upper reaches of which is considered to be the Urheimat of Sino-Tibetan languages. According to the legends, the Karen took a long time to cook shellfish at the river of flowing sand, until the Chinese taught the Karens to open the shells so as to acquire the meat.