The term “gaslighting” comes from a 1938 British stage play called Gas Light and its later film adaptations, especially the 1944 movie Gaslight starring Ingrid Bergman.

Quick Scoop: Origin of “Gaslighting”

In the original play Gas Light by Patrick Hamilton, a husband secretly dims the gas lamps in the house while searching for hidden jewels, then insists to his wife that she’s imagining the change. His goal is to make her doubt her sanity so he can control her and access her wealth. This disturbing dynamic became the core metaphor behind the modern psychological term.

The word itself wasn’t commonly used right away; it really took off decades later, especially after the 1944 film became widely known. Over time, psychologists and writers began using “gaslighting” to describe similar real‑life patterns of manipulation where someone is pushed to question their own perception of reality.

From Old Movie Title to Modern Buzzword

Today, “gaslighting” usually means a pattern of psychological manipulation where a person (or group) makes someone question their memory, perception, or judgment, often to gain power over them. That might involve denying obvious facts, twisting past events, or insisting “you’re overreacting, that never happened” until the victim starts trusting the manipulator more than themselves.

In the 2010s and early 2020s, the term exploded in online conversations, politics, and therapy talk, to the point where some experts now worry it’s overused or used too loosely for everyday disagreements. Still, its roots are firmly in that dark, atmospheric story of flickering gas lamps and a husband trying to erase his wife’s reality.

TL;DR: The term “gaslighting” comes from the 1938 play Gas Light and its 1944 film remake, where a husband manipulates his wife into thinking she’s crazy by denying the obvious—like the dimming gas lights.

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