The property of being levelheaded, stable, not overly swayed by passion.(noun)
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Use "levelheadedness" in a sentence
"His levelheadedness is put to the test as he deals with a worker uprising, a frigid wife (a criminally underused Kristen Wiig), a con artist (Mila Kunis), and an ambulance-chasing TV lawyer (Gene Simmons)."
"Such levelheadedness leads him into the trap that snares many futurists—his theorizing assumes a souped-up version of today's world rather than a radically changed world."
""He's approached all this with an amazing levelheadedness and a sense of purpose.""