Florence Nightingale was motivated to reform healthcare by her experiences during the Crimean War. Witnessing the horrific conditions in military hospitals, she realized the significant impact of hygiene and organization on patient outcomes. Nightingale's determination to improve nursing standards and advocate for public health reforms stemmed from her personal belief in the power of data and evidence-based practices. Her holistic approach led to the establishment of modern nursing practices and improved healthcare systems, underscoring her pivotal role in shaping the profession and influencing health policy.