There is nothing in a dog's DNA that says they should sit stay, walk nicely on a leash, come when called or any of the other things we as humans want them to do.  So, each skill must be taught.  A well-trained dog is something to be admired. Did the well-trained dog get that way because the dog is smarter? Is the person smarter? Nope, neither of these are correct.  The answer is in this podcast.  What makes a well-trained dog?