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"I am fond of pigs. Dogs look up to us. Cats look down on us. Pigs treat us as equals."
Attributed to Winston Churchill (1874 - 1965).
The slave trade is largely dead and we say it was immoral. But few people thought that at the time, partly because economies depended on it and few people had much direct contact with slaves. One day everyone may say our exploitation of animals was immoral. Until then not many people think it immoral, economies depend on it and few people encounter its harsh reality. Yet animal rights is an important social issue that affects everyone and the moral development of humanity.