Adler was born on January 22, 1884, in Chicago, Illinois. He started out as a vaudeville actor and then became a title writer for Mack Sennett silents in the early 1920s, easing into talkies with three Harold Lloyd features and as a staff writer for the Columbia Pictures Short Subject department, a position he held until its demise in 1957.
While the vast majority of Adler's writing credits were for Sennett and Three Stooges short subjects, Adler co-wrote six features for Laurel and Hardy as well as two for Abbott and Costello.
A resident of Hollywood Hills, he was sociable, chatting with neighbors at the Beachwood Village Laundry and giving pocket money to local children. His house became a stop-off for neighbors on their way to and from the Beachwood Market because he would invariably invite them in for a refreshment.
As a joke, Adler would sometimes misspell his surname as "Alder" in the credits
In some Three Stooges shorts, there were many things named after Adler such as a box of soap in Baby Sitters Jitters and a liquor store in Nutty But Nice.
The last Three Stooges film featuring Adler's writing was Stop, Look and Laugh, a compilation of previously filmed shorts, released in 1960, just three years before he died. The last original Stooge short Adler wrote was 1958's Oil's Well That Ends Well.
Sometimes Adler would co-write with another writer who had worked with The Three Stooges many times, Clyde Bruckman, like in You Nazty Spy!, which they both co-wrote together.
References
^Solomon, Jon (2002). The Complete Three Stooges: The Official Filmography and Three Stooges Companion. Glendale, California: Comedy III Productions, Inc. pp. 45–47. ISBN0-9711868-0-4.