You can describe extremely cruel actions as inhumanity.
...the inhumanity of war. [+ of]
...man's inhumanity to man.
Synonyms: cruelty, atrocity, brutality, ruthlessness More Synonyms of inhumanity
inhumanity in British English
(ˌɪnhjuːˈmænɪtɪ)
nounWord forms: plural-ties
1.
lack of humane qualities
2.
an inhumane act, decision, etc
inhumanity in American English
(ˌɪnhjuˈmænəti)
noun
1.
the quality or condition of being inhuman or inhumane
2. Word forms: pluralˌinhuˈmanities
an inhuman or inhumane act or remark
Word origin
LME inhumanite < MFr < L inhumanitas
Examples of 'inhumanity' in a sentence
inhumanity
The scepticism and sheer inhumanity of its tone cannot fail to anger you.
Times, Sunday Times (2007)
It teaches you about humanity and inhumanity without making you feel you're being taught.
Times, Sunday Times (2007)
Yet while profits soared, so did public and political outrage at the sheer inhumanity of the trade.
Times, Sunday Times (2007)
And he told of'the sheer inhumanity of the perpetrators '.
The Sun (2010)
Mostly, I hope people see the humanity and kindness that followed an act of inhumanity.
The Sun (2015)
Quotations
Man's inhumanity to man Makes countless thousands mournRobert BurnsMan was Made to Mourn
The worst sin towards our fellow creatures is not to hate them, but to be indifferent to them: that's the essence of inhumanityGeorge Bernard ShawThe Devil's Disciple
(noun)
Definition
lack of kindness or compassion
the inhumanity of war
Synonyms
cruelty
laws against cruelty to animals
atrocity
stomach-churning tales of atrocity and massacre
brutality
The Roman arena played host to appalling brutality in the name of entertainment.
ruthlessness
barbarism
Not the death penalty: barbarism must not be met with barbarism.
viciousness
the intensity and viciousness of this attack
heartlessness
unkindness
He realized the unkindness of the remark.
brutishness
cold-bloodedness
pitilessness
cold-heartedness
hardheartedness
Quotations
Man's inhumanity to man Makes countless thousands mourn [Robert Burns – Man was Made to Mourn]The worst sin towards our fellow creatures is not to hate them, but to be indifferent to them: that's the essence of inhumanity [George Bernard Shaw – The Devil's Disciple]
Additional synonyms
in the sense of atrocity
Definition
behaviour that is wicked or cruel
stomach-churning tales of atrocity and massacre
Synonyms
cruelty,
wrong,
horror,
brutality,
wrongdoing,
enormity,
savagery,
ruthlessness,
wickedness,
inhumanity,
infamy,
transgression,
barbarity,
viciousness,
villainy,
baseness,
monstrousness,
heinousness,
nefariousness,
shockingness,
atrociousness,
fiendishness,
barbarousness,
grievousness,
villainousness
in the sense of barbarism
Definition
the condition of being backward, coarse, or ignorant
Not the death penalty: barbarism must not be met with barbarism.
Synonyms
cruelty,
outrage,
atrocity,
brutality,
savagery,
ruthlessness,
wickedness,
inhumanity,
barbarity,
viciousness,
coarseness,
crudity,
monstrousness,
heinousness,
fiendishness,
barbarousness
in the sense of brutality
The Roman arena played host to appalling brutality in the name of entertainment.