Controlling idea

In practice

A controlling idea is the single sentence that states what a piece of writing is about and what it argues or means. In an essay or a paragraph, it works like a thesis or topic sentence: every detail that follows should support it. In a story, the term usually comes from Robert McKee's Story (1997), where the controlling idea is the meaning the ending proves, expressed as a value and its cause.

McKee's version has two parts: a value (justice, love, survival, freedom) and the cause that makes it win or lose. "Justice triumphs because the protagonist is more violent than the criminals" is his kind of controlling idea for a certain kind of crime film. "Love fails when we put ambition first" could be the controlling idea of a tragic romance. The sentence names an outcome and a reason, so it can be tested against the climax.

Teachers use the same term in a simpler way. In middle and high school writing, the controlling idea of a paragraph is its main point plus the writer's angle on it: not "dogs" but "dogs make better first pets than cats because they are easier to train." Either way, the controlling idea is narrower than a topic and more specific than a theme, which is why it is useful while you write.

A controlling idea in a story meeting

"Family" is a topic, not a controlling idea. June pushes Owen to the ending and asks what happens and why, and his answer gives them a value (healing), a direction (it wins) and a cause (a costly truth). The card goes above the outline because every scene can now be checked against it.

Controlling idea examples

For an essay: "School uniforms reduce bullying because they remove one visible marker of family income." For a paragraph: "The opening scene of Jaws makes the ocean frightening before the shark appears." Each sentence names a subject and a specific claim about it that the rest of the writing can prove.

For stories, a controlling idea is often clearest when you work backward from the ending. A heist film might be "Loyalty wins when the crew trusts each other more than the money." A tragedy might be "Ambition destroys a man who believes he can outrun fate." A comedy might be "Love wins when two people stop performing for each other." These are not slogans for the audience; they are a test for the writer.

A useful controlling idea is specific enough to be wrong. "Love is important" cannot be disproved, so it cannot guide a scene. "Love dies when one partner keeps a secret" can be, which means you can look at each scene and ask whether it pushes toward or against that outcome.

Controlling idea vs. theme, thesis and premise

A theme is a subject or question a work explores: grief, power, identity. A controlling idea takes a position on it: what the story says happens and why. Many works have several themes but, in McKee's sense, one controlling idea, because a story has one ending that proves one thing.

In essay writing, thesis and controlling idea are close cousins. Teachers often use "thesis" for the main claim of a whole essay and "controlling idea" for the main claim of a paragraph, or treat the two as the same. A premise, in screenwriting, is the dramatic situation that starts the story ("what if a shark attacked a beach town on the Fourth of July?"); the controlling idea is what the ending makes of it.

How to write a controlling idea

For a paragraph or essay, start with your topic, add your opinion or angle, then add the main reason. "Social media" becomes "Social media harms teenagers" becomes "Social media harms teenagers because it measures popularity in public numbers." If your sentence could start a paragraph and every following sentence would support it, it is working.

For a story, look at your climax and answer two questions: which value is at stake in the final scene, and does it win or lose? Then ask why, in terms of what the protagonist does. Write the answer as one sentence: value, outcome, cause. If the sentence surprises you, or makes you want to change the ending, that is useful information too.

Using a controlling idea in revision

Once you have the sentence, put it where you will see it: at the top of the outline, on the first index card or in a note above your first scene. In Plot, a note at the top of the script stays with the draft, so it is there whenever you open a scene to rewrite it. Then read your scenes one by one and ask whether each moves the value toward or away from the ending's outcome.

Scenes that do neither are candidates to cut or rewrite. Scenes that seem to argue against the controlling idea are often the most valuable, because a story that only proves its point from one side feels like a lecture. McKee calls this the counter-idea: the strongest version of the opposite view, which the ending then has to beat.

A five-minute controlling idea exercise

Write your story's topic in one word. Then write what happens to that topic at the end in one word: wins, loses, heals, breaks. Then add "because" and the protagonist's key action. You now have a rough controlling idea. Rewrite it twice, each time making the cause more specific.

Finally, write the counter-idea, the sentence your antagonist would believe. Look for one scene where the counter-idea seems to be winning. If you cannot find one, your story may need a stronger opposing force before the ending can prove anything.