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From the bestselling author of Team of Teams and My Share of the Task, reflections on character, and who we choose to be.

“Reputation is what men and women think of us;

character is what God and angels know of us.”

—Thomas Paine

How to measure a life? After a career of service, retired four-star general Stanley McChrystal had much to contemplate. He pondered his successes and failures, his beliefs and aspirations, and asked himself, Who am I, really? And more importantly, who have I become? When I die, how will I be measured?

In the end, McChrystal came to a conclusion as simple as it was profound: the reality of who we are cannot be recorded in dates or accomplishments. It is found in our character—the most accurate, and last full measure, of who we choose to be.

On Character offers McChrystal’s blueprint for living with purpose and integrity, challenging us to examine not just our deeds but who we become through them. Drawing from a lifetime of experience, he distills profound insights on setting and meeting standards, aligning actions with beliefs, and offers practical advice on overcoming obstacles and pursuing self-improvement.

According to McChrystal, character is not a trait inherited at birth, nor does it automatically come from education, position, or experience. Character, instead, comes down to a succession of choices, most mundane, several momentous, that reveal the deep truth of our capacity for virtue.

In an era where understanding and upholding our ideals is more crucial than ever, On Character offers an inspiring roadmap for personal growth and integrity—a call to become our best selves, both as individuals and as Americans.