Imagine initial human , in about 1 million years ago... i guess they had been completely similar to wild animals... without any civilization... before invention of "language", they could communicate just by some sounds, (perhaps like what monkeis do), they had been dirty and dangerous, going hunting in groups and they used to eat raw meat... but passing years, they changed... till now that they are living in civilized cities...now i have a question... how can we be sure that such thing wont happen for animals? may be they are not as intelligent as humen, but that doesn't mean they can never be civilized, it means that it will take more time for them,,, for example 2 million years!... and they will start to be friendly with each other... they will have their own country, thier own rules, their own language and culture , their own shops and business, and imagine the position of human in that world! ,,,we will have to import egg , milk , meat (!!!) ,and any other food from their countries, and if they don't agree, we will die of hunger!!!