The founder of modern nursing is Florence Nightingale. She revolutionized the field of nursing during the mid-19th century, particularly during the Crimean War, where her efforts in improving sanitation and healthcare for soldiers significantly reduced mortality rates. Nightingale established rigorous training standards for nurses and emphasized the importance of hygiene, patient care, and statistical analysis in healthcare. She is also known for her pioneering use of the pie chart to present data on the causes of death in her reports. Her contributions laid the foundation for professional nursing today, inspiring generations of healthcare workers.