If you get caught at some crucial point and somebody tells you that your doctrine doesn’t make sense—you’re ready for him.
He found now that the membership was small—and crucial; it included all his key men, not the big executives, but the rank below, expertly chosen, the active ones, the small, indispensable spark plugs: the best leg men, the general assignment men, the rewrite men, the assistant editors.
In the flash when walls rose outward and a building opened like a sunburst, she thought of him there, somewhere beyond, the builder who had to destroy, who knew every crucial point of that structure, who had made the delicate balance of stress and support; she thought of him selecting these key spots, placing the blast, a doctor turned murderer, expertly cracking heart, brain and lungs at once.
…of his position; the quiet elegance of his overcoat, the angle of his hat, the confidence of his posture, tense and casual together, made one think of the Wynand empire; of the presses thundering from ocean to ocean, of the papers, the lustrous magazine covers, the light rays trembling through newsreels, the wires coiling over the world, the power flowing into every palace, every capital, every secret, crucial room, day and night, through every costly minute of this man’s life.
There are no more uses of "crucial" in the book.
Show samples from other sources
Doing well on the SAT is crucial to getting into the college I want to attend.
The information is crucial to making a good decision.