This post was originally published 5 January 2012. The links have been updated. Why is it in the “Music” category? Because it’s so relevant there… and sadly, today’s world in general.
Gaslight was a 1944 noire film that starred Charles Boyer and Ingrid Bergman. The term, ‘to gaslight,’ comes directly from the plot.
Updated 4 December 2021 with the following suggested articles. See if they ring any bells.