Final answer:
Florence Nightingale defined nursing as having charge of the personal health of somebody and putting the patient in the best condition for nature to act upon them.
Step-by-step explanation:
The person who defined nursing as having "charge of the personal health of somebody..., and what nursing has to do... is to put the patient in the best condition for nature to act upon him" was Florence Nightingale. She is considered the founder of modern nursing and was instrumental in establishing nursing as a respected profession. Nightingale emphasized the importance of creating an environment that supports healing and advocated for providing compassionate care to patients.