causes célèbres, pronounced like the singular) is an issue or incident arousing widespread controversy, outside campaigning, and heated public debate.
[2] The term is sometimes used positively for celebrated legal cases for their precedent value (each locus classicus or "case-in-point") and more often negatively for infamous ones, whether for scale, outrage, scandal, or conspiracy theories.
As John Humffreys Parry states, "The true story of many a cause célèbre is never made manifest in the evidence given or in the advocates' orations, but might be recovered from these old papers when the dust of ages has rendered them immune from scandal".
The phrase originated with the 37-volume Nouvelles Causes Célèbres, published in 1763, which was a collection of reports of well-known French court decisions from the 17th and 18th centuries.
Both attracted worldwide interest and the period of closeness or rapprochement officially broadened the English language.