When did John Steinbeck become a writer?

John Steinbeck didn't have a single, clear-cut "moment" when he became a writer. It was a gradual process, but here are some key milestones:

* Early Influences: Steinbeck was exposed to literature early in life, reading widely and being influenced by writers like Mark Twain and Jack London.

* Early Writing: He started writing seriously in high school and college, submitting stories to magazines and newspapers.

* First Published Work: His first published story, "The Snake," appeared in a college literary magazine in 1925.

* First Novel: His first novel, "Cup of Gold," was published in 1929.

* Critical Success: His breakthrough came with the novel "Tortilla Flat" in 1935.

So, while he started writing early on, it was his sustained effort and dedication, culminating in the publication of "Tortilla Flat," that cemented his career as a writer.