Patrick Hamilton's play Gas Light opened in London in 1938: a husband dims the gaslights and insists his wife imagines it, part of a scheme to have her declared mad. Renamed Angel Street on Broadway in 1941, filmed in Britain in 1940, and then by MGM in 1944 with Ingrid Bergman, who won an Oscar. The verb gaslight drifted into psychiatric and popular use by the 1960s. Robin Stern's 2007 book The Gaslight Effect codified it for the therapy shelf.
For decades gaslighting described intimate abuse, one person dimming one other person's reality. Then the term jumped scale: workplaces, medicine, politics, entire populations told the lights did not flicker. Merriam-Webster reported lookups surging over 1700 percent in 2022 and made it word of the year. A Victorian stage device became the default frame for institutional lying.
The claim: institutional gaslighting works differently from the play, because there is no single villain dimming the lamp, only a distributed system of denials that teaches people to pre-doubt themselves, self-gaslighting installed like firmware. Verdict: provocative and it names a real phenomenon, self-censorship under contradiction pressure, but without a dimmer there is no case, only a mood. The play had Jack. Systems have alibis.
If the tactic predates the word by millennia, why did we need a play to see it?