An area of land used for crops will feed about ten times as many people as the same area of land used for grass-fed beef.

Many people who think nothing of buying factory-farmed ham or chicken from a supermarket are quick to condemn hunting; yet hunting is more defensible than factory farming.

Dairy farmers routinely remove calves from their mothers at an early age so that the milk will be available for humans; anyone who has lived on a dairy farm will know that, for days after the calves have gone, their mothers keep calling for them.

I agree with Varner and Scruton that the more one thinks of one's life as a story that has chapters still to be written, and the more one hopes for achievements yet to come, the more one has to lose by being killed. For this reason, when there is an irreconcilable conflict between the basic survival needs of animals and of normal humans, it is not speciesist to give priority to the lives of those with a biographical sense of their life and a stronger orientation towards the future.

We have to speak up on behalf of those who cannot speak for themselves.

If we have learned anything from the liberation movements, we should have learned how difficult it is to be aware of the ways in which we discriminate until they are forcefully pointed out to us. A liberation movement demands an expansion of our moral horizons, so that practices that were previously regarded as natural and inevitable are now seen as intolerable.

In most countries, it is possible to visit zoos and see bored animals pacing back and forth in cages, with nothing to do but wait for the next meal. Circuses are even worse places for animals. Their living conditions are deplorable, especially in travelling circuses where cages have to be small so that they can go on the road.