“The heart of the question concerns the presumption of a univerasl human Subject, capable of reducing ethical issues to matters of human rights and humanitarian actions. We have seen that ethics subordniates the identification fo this subject to the universal recognition of the evil that is done to him. Ethics defines man as a victim.”

Source: Ethics, Chapter One, "Does Man Exist?"

We have no ethical relation to the clod, the molecule, or the scale sloughed off from our skin on the back of our hand, because the clod, the molecule, and the scale have no feeling, no soul, no anything rendering them capable of being affected by us [...] The fact that a thing is an organism, that it has organisation, has in itself no more ethical significance than the fact that it has symmetry, or redness, or weight.
Source: The New Ethics (1907), The Survival of the Strenuous, p. 169

Source: 1960s, Economics As A Moral Science, 1969, p. 2 cited in: John B. Davis (2011) Kenneth Boulding as a Moral Scientist http://epublications.marquette.edu/cgi/viewcontent.cgi?article=1011&context=econ_workingpapers Working paper

The Philosophy of Antoninus
Context: Antoninus does not treat of Politic. His subject is Ethic, and Ethic in its practical application to his own conduct in life as a man and as a governor. His Ethic is founded on his doctrines about man's nature, the Universal Nature, and the relation of every man to everything else. It is therefore intimately and inseparably connected with Physic or the Nature of Things and with Theology or the Nature of the Deity.

Source: Man for Himself (1947), Ch. 3
Context: Temperament refers to the mode of reaction and is constitutional and not changeable; character is essentially formed by a person’s experiences, especially of those in early life, and changeable, to some extent, by insights and new kinds of experiences. If a person has a choleric temperament, for instance, his mode of reaction is "quick and strong.” But what he is quick or strong about depends on his kind of relatedness, his character. If he is a productive, just, loving person he will react quickly and strongly when he loves, when he is enraged by injustice, and when he is impressed by a new idea. If he is a destructive or sadistic character, he will be quick and strong in his destructiveness or in his cruelty. The confusion between temperament and character has had serious consequences for ethical theory. Preferences with regard to differences in temperament are mere matters of subjective taste. But differences in character are ethically of the most fundamental importance.

The Concept of the Political (1927)

The Issue (1908)
Context: Now my friends, I am opposed to the system of society in which we live today, not because I lack the natural equipment to do for myself, but because I am not satisfied to make myself comfortable knowing that there are thousands of my fellow men who suffer for the barest necessities of life. We were taught under the old ethic that man's business on this earth was to look out for himself. That was the ethic of the jungle; the ethic of the wild beast. Take care of yourself, no matter what may become of your fellow man. Thousands of years ago the question was asked: "Am I my brother's keeper?" That question has never yet been answered in a way that is satisfactory to civilized society.
Yes, I am my brother's keeper. I am under a moral obligation to him that is inspired, not by any maudlin sentimentality, but by the higher duty I owe to myself. What would you think of me if I were capable of seating myself at a table and gorging myself with food and saw about me the children of my fellow beings starving to death?

Through a Window: My Thirty Years with the Chimpanzees of Gombe (2000), p. 245