Caleb Williams Saleeby (1878 - December 9, 1940) was an English physician, writer, and journalist. He was an advocate of eugenics: in 1907 he was influential in launching the Eugenics Education Society. He was a contributor to the first edition of Arthur Mee's The Children's Encyclopedia. His contributions were explicitly race realist: he saw mankind as the pinnacle of evolution, and white men as superior to other men, based on "craniometry". He favored the education of women, but primarily so they should become better mothers. During World War I, he was an adviser to the Minister of Food and advocated the establishment of a Ministry of Health. He campaigned for clean air and the benefits of sunlight, founding a Sunlight League in 1924. He died in 1940 from heart failure at the age of 62.