Dogs don’t come from wolves, but dogs and wolves have a common ancestor, a wolf population that went extinct and differs from dogs and modern wolves. They still are the same species to biology standards (even with the fact of crazy breeding happening), but psychologically and which is the root of the split, they are very different and the more important change. Wolf are predisposed to being shy and hate anything novel once they are adults, dogs are very transient socially and very curious. Both being their nature how they have survived.