Slightly tangential, but I think that dogs have allowed for some bad things to happen to us. Like, they are available physically, so if you don’t want to go insane in this society of ours where you are allowed to have physical contact with at most one person (your one and only partner), you can get a dog or five, or simply pet your friend’s dog or even a neighbor’s. Many post-agricultural revolution civilizations predicated on small family cells and strict property and succession rules would have been impossible without a dog to pet.