[A Mippyville repost]
At least the birth of EC's horror line which was inspired by what was
thought of, even in the Fifties, as old time radio horror shows like
Inner Sanctum (which featured the creepy, pun-loving host, Raymond) and
Light's Out (which had stories every bit as violent and disturbing as
anything EC ever published as well as a progressive political viewpoint
similar to that of Gaines). Sanctum has dated badly but most of
Light's Out remains effective to this day (listen for yourself here).
With that out of the way...