The editors provide annotated readings and biographical details to punctuate the historical timeline and to provide students with insights into the progression of ideas, initiatives, and reforms in the field. From Hippocrates and John Graunt in the early period, to John Snow and Florence Nightingale during the nineteenth-century sanitary reform movement, to Upton Sinclair and Margaret Sanger in the Progressive Era, readers follow the identification, evolution, and implementation of public health concepts as they came together under one discipline.