King had a dream. He longed for a world where the races of Man could live together in a spirit of brotherhood. I too have a dream. I dream of a world where Man is at peace, not only with himself, but also with all the other creatures of Earth. I long for a day when Man rejects the exploitation of other species for food, clothing, health, entertainment or even companionship - for such a day will mean...

In The Descent of Man, first published in 1871 Charles Darwin wrote:

• As man advances in civilization, and small tribes are united into larger communities, the simplest reason would tell each individual that he ought to extend his social instincts and sympathies to all the members of the same nation, though personally unknown to him. This point being once reached, there is only an artificial barrier to

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