Effective altruism is the form of altruism in which we bring our rational capacities to bear in order to do the most good that we can.

I don't think nationalism is alone holding the field; it's in contention with a lot of different things.

Whatever the reason, for most of the present century, the literature and publicity of the old established [animal welfare] groups made a significant contribution to the prevailing attitude that dogs and cats and wild animals need protection, but other animals do not. Thus people came to think of "animal welfare" as something for kindly ladies who are dotty about cats, and not as a cause founded on basic principles of justice and morality.

It is an indication of the extent to which people are now isolated from the animals they eat that children brought up on storybooks that lead them to think of a farm as a place where animals wander around freely in idyllic conditions might be able to live out their entire lives without ever being forced to revise this rosy image.

If they [animals] were really to get the equal consideration that I believe they should, we wouldn't have commercial animal production in this country.

I am not saying that factory farming is the same as the Holocaust or the slave trade, but it's clear that there is an immense amount of suffering in it, and just as we think that the Nazis were wrong to ignore the suffering of their victims, so we are wrong to ignore the sufferings of our victims.

If we all think only of our own interests, we are headed for collective disaster - just look at what we are doing to our planet's climate.