Grit to Great, by Linda Kaplan Thaler and Robin Koval, argues that success stems not from innate talent but from grit: a combination of passion, perseverance, resilience, initiative, and tenacity. The book uses examples of highly successful individuals to illustrate how hard work and determination overcome obstacles and that perceived limitations, such as age or lack of formal education, are often self-imposed. It emphasizes the importance of goal setting, embracing failure, and developing a growth mindset to achieve long-term objectives. The authors also discuss the role of grit in pursuing meaningful endeavors and contributing to society.