Sea change or sea-change is an English idiomatic expression that denotes a substantial change in perspective, especially one that affects a group or society at large, on a particular issue.
It is similar in usage and meaning to a paradigm shift, and may be viewed as a change to a society or community's zeitgeist, with regard to a specific issue.
The term appears in William Shakespeare's The Tempest in the song Full fathom five sung by a supernatural spirit, Ariel, to Ferdinand, a prince of Naples, after Ferdinand's father's apparent death by drowning.
[2][3] A literary character may transform over time into a better person after undergoing various trials or tragedies (e.g. "There is a sea change in Scrooge's personality towards the end of Charles Dickens' A Christmas Carol.")
As with the term Potemkin village, sea change has also been used in business culture.