Reddit reviews Dogs: A Startling New Understanding of Canine Origin, Behavior & Evolution

u/hoveringintowind is right. Modern wolves and dogs evolved from a common ancestor. Dogs evolved naturally to scavenge our waste. Humans did not begin artificially selecting them until much later. Wolves can also interbreed with coyotes and jackals. All four are widely divergent species that fill different ecological niches. Your position is outdated, like dominance theory. In my lifetime, our understanding of canine and lupine ethology and biology has completely changed.

Source: All Coppinger and Feinstein work, but most seminally, Dogs: A Startling New Understanding of Canine Origin, Behavior & Evolution

If you want a book, try Dogs by Ray Coppinger. He's a brilliant animal behavioralist who figured out a lot about how dogs domesticated themselves (by eating our garbage when food was scarce, basically, and then selecting for traits that made them seem friendlier so they wouldn't get driven off), and the very subjects you mentioned. Plus, his writing style is very accessible to non-experts, which is always nice.

They have a book. If you want an idea of what its about/them here is a little interview with them.