It's simple: films need to have commercial value for the studios to produce them, distributors to sell them, and theater chains to screen them. While talent definitely plays a part in the writing process, it can be the well-executed formulaic approaches to the popular genres that will first get you noticed in the industry.

Genre Screenwriting: How to Write Popular Screenplays That Sell does not attempt to probe in the deepest psyche of screenwriters and directors of famous or seminal films, nor does it attempt to analyze the deep theoretic machinations...