I know this wasn't the original point, but I have to point out that the domestication of certain species wasn't 100% conscious and directed only by humans. I've once read an interesting article about how dogs "domesticated" themselves in a way by realizing that humans are beneficial to their survival, and I'm sure many more examples could be found in nature for this phenomenon.
I only say this because I don't think it serves any purpose to try and solve economical and social issues of our distant past... mainly because I don't think all of that happened on a conscious level. Many species became intertwined in the pre-history of mankind, we hunted animals because we were animals, then as we became more human-like, some animals became accustomed to our company and we mutually evolved in a way that gave the basis for what is going on today. But it is such a complex system where there are a billion factors affecting certain processes that it comes down as demagogic to try to say that "this was wrong", "this was right".
I believe that the original domestication of the many species we find around ourselves (including vegetables and the like) happened on a semi-unconscious level, I would even call that the simple act of natural selection in a way, but whatever industrial apparatus has been built upon that original, natural gift is the real issue that we face nowadays, within the food, fashion and other related industries that exploit and abuse animals and other living things (including humans).
And I don't think anyone on these forums would argue that the modern food industry is completely fine and we shouldn't do anything about it. But, and I have to go back to our original argument in the Cruella topic (lol), some of us were merely pointing out that there is a reason why people are more sensitive towards the abuse of dogs than other domesticated house animals, such as cows or chicken. There are cultural reasons, and I'm pretty sure there are evolutionary reasons. This is something worth discussing, but I don't think anyone argued here that animal abuse and systematic extermination, in general, is okay...