"Art, literature, and film define America's cultural identity." Now an argument can be sparked.
Some essays may require more than a single sentence.
However, the statement should be as clear and concise as possible in the final draft of the essay.
For instance, when using a working thesis, the writer knows that the thesis can be changed to fit in an extra topic if the essay needs it: " America's cultural identity can be defined by art, literature, music, and film." The role of the working thesis is to lessen the stress of writing a collegiate essay and to incorporate some flexibility into the writing process.
Knowing that a working thesis will be subjected to numerous revisions allows the writer more freedom when writing the essay.
A working thesis allows for a writer to approach the topic with a thesis in mind, even though that thesis can be revised (and it will be numerous times) during the writing prcess.
Constructing a working thesis should come after brainstorming or deriving a topic.
The shorter and more direct a thesis statement is the more confident and assertive the writer sounds.
Being assertive and confident is crucial, especially in argumentative essays. Each proposed or considered topic within the essay should have some relevance to your thesis statement.
If this thesis were to be used, it probably would be revised again to make it more specific; the types of art, literature, and film would need clarification.
Make sure that your paper reinforces your thesis statement at all times.