The state of being degenerate in mental or moral qualities WordNet 3.0 & Open English WordNet

The word decadence, which at first meant simply "decline" in an abstract sense, is now most often used to refer to a perceived decay in standards, morals, dignity, religious faith, honour, discipline, or skill at governing among the members of the elite of a very large social structure, such as an empire or nation state. Wikipedia

Involves a perceived decay in standards, morals, dignity, religious faith, or skill over time Wikipedia Disambiguation

Perceived decay in standards, morals, dignity, religious faith, or skill at governing Wikidata

Moral degeneration or decay. OmegaWiki

A state of moral or artistic decline or deterioration; decay. Wiktionary

State of moral or artistic decline or deterioration. Wiktionary (translation)

The state of being degenerate (in all senses). Wiktionary