Assertion: nostalgia | /r/CapableOf | think as mental disorder
Facets:
value: until the mid-20th century
type: TEMPORAL
Source sentences:
text: Originally defined by ancient Greek philosophers as “psychological suffering caused by unrelenting yearning to return to one’s homeland” and thought of as a mental disorder until the mid-20th century, nostalgia is not always as innocuous as we would like to think.