Click image to enlarge. Early draft of the screenplay for ‘Shakespeare in Love’ by Marc Norman and Tom Stoppard, 1998.

Of all the elements of filmmaking, the screenplay is arguably the most important. It is also the element most debated, discounted, discarded, and arbitrated. More often than not, the screenplay is an adaptation of another work—a novel, play, news story, biography, or even another screenplay.

The screenplay expresses character and narrative and is therefore the focus of interpretation by the director, actors, and designers. Furthermore, the screenplay is the foundation on which all the other artists and technicians base their work. Whether a scene takes place indoors or outdoors, for example, may affect the sets the art director designs and builds and…