Many historical linguists view any speech form as a dialect of the older medium of communication from which it developed.[citation needed] This point of view sees the modern Romance languages as dialects of Latin, modern Greek as a dialect of Ancient Greek, Tok Pisin as a dialect of English, and North Germanic as dialects of Old Norse. This paradigm is not entirely problem-free. It sees genetic relationships as paramount: the "dialects" of a "language" (which itself may be a "dialect" of a yet older language) may or may not be mutually intelligible. Moreover, a parent language may spawn several "dialects" which themselves subdivide any number of times, with some "branches" of the tree changing more rapidly than others.