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 members of the same nation, though personally unknown to him. This point being once reached, there is only an artificial barrier to prevent his sympathies extending to the men of all nations and races.

Animals don't hate, and we're supposed to be better than them.

I hold that while man exists, it is his duty to improve not only his own condition, but to assist in ameliorating mankind; and therefore ... I am for those means which will give the greatest good to the greatest number.

Tradition will accustom people to any atrocity.

The worst sin toward our fellow creatures is not to hate them, but to be indifferent to them: that's the essence of inhumanity.

It is a kingly act to assist the fallen.