immoralism 
noun [mass noun]
A system of thought or behaviour that does not accept moral principles.The extremism of Nietzsche's immoralism was in his proclaiming that morality could no longer be rooted in human nature, because in the future human nature would be transformed, if not abolished altogether....
- She begins with a preliminary account of Plato's response to immoralism in the first two books of the Republic.
- Despite the inconsistency, they think that Thrasymachus is ultimately advocating an immoralism since justice is defined as ‘another's good,’ i.e., the advantage of the stronger tyrant.
Derivatives
immoralist
- Nietzsche does not investigate these matters of nomenclature, but when he is condemning morality or kinds of morality, and when he is calling himself an immoralist, he has the purpose and point of life in mind.
- And since their version of the immoralist position departs in significant ways from its inspiration, it would be somewhat misleading to treat the Republic as a whole as a response to Thrasymachus.
- Is it not the duty of governments to take action against immoralist philosophers who are undermining civilisation?
Origin
Early 20th century: suggested by German Immoralismus.