GOOD QUESTION ANON. Well, this one’s going to be a doozy, so I’m just going to jump right in, and you’ll have to try to keep up.
As we all know, the earth is 87 bazillion years old. And, you also might know that, clearly, the creatures that are alive today are not the same species as the ones in, say, the Wizard Era approx. 253 flillion years ago. If they were, you would obviously be a wizard, and so would I, and so would your dog.
Speaking of dogs, let me just segue right in to the next section, because, of course, your dog is no more a wolf than you are a wizard, but there is physical fossil data that suggests, perhaps, your dog is descended from a wolf. An uneducated heathen might say “well, of course, humans artificially selected for doglike traits in wolves, and over time, dogs happened!” But heathens don’t know any better, so go easy on them.
The truth is dogs are not wolves because one day wolves were looking at how chummy early humans seemed, and were like “Nah man, fuck this. I am going to invent a time machine and convince the wizards to turn me in to a dog.”
Darwin’s finches are another excellent example. In this case, we call it “the indecision effect” since many birds went back in time and couldn’t decide what niche to fill, and the wizards got fed up and gave them all different ones.
This is true for most of earth’s history*, except for, of course, the Mesozoic, when the ornithischian overlords were in charge of all evolving. This was only possible due to a paradoxical set of circumstances in which the Late Cretaceous ornithischians went back in time to the Triassic ornithischians and revealed the secrets to their success, thus ensuring their success until their demise due to self-immolating weaponized Argentinosaurs.
Evolution is a beautiful thing.
*Wizards, of course, did not evolve, but spontaneously came in to being when the universe was formed.