Their culture believed that an individual person was in fact a community of individuals, each with their own voice, their own desires, and their own view of the world. This belief was manifested in one of their forms of art known as a Kurlan naiskos.
The Kurlan history could be divided into several ages, among them the Third Dynasty (about twelve thousand years ago) and the Fifth Dynasty. The Kurlans died out several millennia before the 24th century. (TNG: "The Chase")