War means blind obedience, unthinking stupidity, brutish callousness, wanton destruction, and irresponsible murder.
— Alexander Berkman

Once conform, once do what other people do because they do it, and a lethargy steals over all the finer nerves and faculties of the soul. She becomes all outer show and inward emptiness; dull, callous, and indifferent.
Virginia Woolf callousness quote

One of the fundamental reasons why so many doctors become cynical and disillusioned is precisely because, when the abstract idealism has worn thin, they are uncertain about the value of the actual lives of the patients they are treating. This is not because they are callous or personally inhuman: it is because they live in and accept a society which is incapable of knowing what a human life is worth.
— John Berger

The family is the basic cell of government: it is where we are trained to believe that we are human beings or that we are chattel, it is where we are trained to see the sex and race divisions and become callous to injustice even if it is done to ourselves, to accept as biological a full system of authoritarian government.
— Gloria Steinem

For in all the world there are no people so piteous and forlorn as those who are forced to eat the bitter bread of dependency in their old age, and find how steep are the stairs of another man's house. Wherever they go they know themselves unwelcome. Wherever they are, they feel themselves a burden. There is no humiliation of the spirit they are not forced to endure. Their hearts are scarred all over with the stabs from cruel and callous speeches.
— callousness quotation by Dorothy Dix