Born, raised, and educated in Italy, Tresca was editor of an Italian socialist newspaper and secretary of the Italian Federation of Railroad Workers before he emigrated to the United States in 1904. After a three-year spell as secretary of the Italian Socialist Federation of North America, he joined the Industrial Workers of the World in 1912, and was involved in strikes across the United States over the rest of the decade. He was jailed in 1925 after printing an advertisement for a birth control pamphlet in one of his newspapers.