Samuel Joseph May, American activist (d. 1871)
Samuel Joseph May (September 12, 1797 – July 1, 1871) was an American reformer during the nineteenth century who championed education, women's rights, and abolition of slavery. May argued on behalf of all working people that the rights of humanity were more important than the rights of property, and advocated for minimum wages and legal limitations on the amassing of wealth.

He was born on September 12, 1797, in an upper-class Boston area. May was the son of Colonel Joseph May, a merchant, and Dorothy Sewell, who was descended from or connected to many of the leading families of colonial Massachusetts, including the Quincys and the Hancocks. His sister was Abby May Alcott, mother of novelist Louisa May Alcott. In 1825, he married Lucretia Flagge Coffin with whom he had five children. Author Eve LaPlante, who wrote several books about his sister Abby May Alcott and a book about Sewall ancestor Judge Samuel Sewall, is one of his direct descendants.