opposites are manifestations of the single Tao, and are therefore not independent from one another, but rather a variation of the same unifying force throughout all of nature. In other religions Samoyed peoples In a Nenets myth, Num and Nga collaborate and compete with each other, creating land, there are also other myths about competing-collaborating demiurges. Comparative studies of Kets and neighboring peoples Among others, also dualistic myths were investigated in researches which tried to compare the mythologies of Siberian peoples and settle the problem of their origins. Vyacheslav Ivanov and Vladimir Toporov compared the mythology of Ket people with those of speakers of Uralic languages, assuming in the studies, that there are modelling semiotic systems in the compared mythologies; and they have also made typological comparisons. Among others, from possibly Uralic mythological analogies, those of Ob-Ugric peoples and Samoyedic peoples are mentioned. Some other discussed analogies (similar folklore motifs, and purely typological considerations, certain binary pairs in symbolics) may be related to dualistic organization of society—some of such dualistic features can be found at these compared peoples. It must be admitted that, for Kets, neither dualistic organization of society nor cosmological dualism has been researched thoroughly: if such features existed at all, they have either weakened or remained largely undiscovered; although there are some reports on division into two exogamous patrilinear moieties, folklore on conflicts of mythological figures, and also on cooperation of two beings in creating the land: the diving of the water fowl. If we include dualistic cosmologies meant in broad sense, not restricted to certain concrete motifs, then we find that they are much more widespread, they exist not only among some Siberian peoples, but there are examples in each inhabited continent. Chukchi A Chukchi myth and its variations report the creation of the world; in some variations, it is achieved by the collaboration of several beings (birds, collaborating in a coequal way; or the creator and the raven, collaborating in a coequal way; or the creator alone, using the birds only as assistants). Fuegians All three Fuegian tribes had dualistic myths about culture heros. The Yámana have dualistic myths about the two brothers. They act as culture heroes, and sometimes stand in an antagonistic relation with each other, introducing opposite laws. Their figures can be compared to the Kwanyip-brothers of the Selk'nam. In general, the presence of dualistic myths in two compared cultures does not