Joseph T. "Cap" Shaw was the editor of Black Mask magazine from 1926 to 1936.
Prior to becoming Black Mask editor, Shaw had worked as a newspaper reporter and as a soldier in World War I

World War I

World War I , which was predominantly called the World War or the Great War from its occurrence until 1939, and the First World War or World War I thereafter, was a major war centred in Europe that began on 28 July 1914 and lasted until 11 November 1918...

, attaining the
rank of captain (Shaw's friends gave him the nickname "Cap").
Shaw was also a professional fencer

Fencing

Fencing, which is also known as modern fencing to distinguish it from historical fencing, is a family of combat sports using bladed weapons.Fencing is one of four sports which have been featured at every one of the modern Olympic Games...

,
and even won an Olympic

Olympic Games

The Olympic Games is a major international event featuring summer and winter sports, in which thousands of athletes participate in a variety of competitions. The Olympic Games have come to be regarded as the world’s foremost sports competition where more than 200 nations participate...

 medal for his fencing ability.
Under his editorship, Black Mask published many works of crime fiction

Crime fiction

Crime fiction is the literary genre that fictionalizes crimes, their detection, criminals and their motives. It is usually distinguished from mainstream fiction and other genres such as science fiction or historical fiction, but boundaries can be, and indeed are, blurred...

 now recognised as classics of the genre, by authors such as Dashiell Hammett

Dashiell Hammett

Samuel Dashiell Hammett was an American author of hard-boiled detective novels and short stories, and political activist. Among the enduring characters he created are Sam Spade , Nick and Nora Charles , and the Continental Op .In addition to the significant influence his novels and stories had on...

, Raymond Chandler

Raymond Chandler

Raymond Thornton Chandler was an American novelist and screenwriter.In 1932, at age forty-five, Raymond Chandler decided to become a detective fiction writer after losing his job as an oil company executive during the Depression. His first short story, "Blackmailers Don't Shoot", was published in...

,
and Erle Stanley Gardner

Erle Stanley Gardner

Erle Stanley Gardner was an American lawyer and author of detective stories, best known for the Perry Mason series, he also published under the pseudonyms A.A. Fair, Kyle Corning, Charles M. Green, Carleton Kendrake, Charles J...

.
Chandler greatly admired Shaw's ability to encourage Black Mask writers, claiming in a letter,
"We wrote better for him than we could have written for anybody else".

Despite Black Mask's critical and commercial popularity, Shaw was eventually fired from the magazine. Shaw then
worked as a literary agent

Literary agent

A literary agent is an agent who represents writers and their written works to publishers, theatrical producers and film producers and assists in the sale and deal negotiation of the same. Literary agents most often represent novelists, screenwriters and major non-fiction writers...

. He died in Manhattan

Manhattan

Manhattan is the oldest and the most densely populated of the five boroughs of New York City. Located primarily on the island of Manhattan at the mouth of the Hudson River, the boundaries of the borough are identical to those of New York County, an original county of the state of New York...

aged 77.