 He was one of the organizers of the General Strike of 1917, the culmination of a series of partial strikes, lockouts and labour conflicts in the city of São Paulo that then spread to other major cities such as Rio de Janeiro.He was arrested shortly afterwards, under the accusation of having led a raid on a grain mill.Edgard Leuenroth published many newspapers, such as "O Boi" ("The Ox"), "O Trabalhador Gráfico" ("The Graphical
Worker"), "A Lucta Proletária" ("The Proletarian Fight"), "Ação Direta" ("Direct Action"), "Spartacus", "A Plebe" ("The Mob"), "O Combate" ("The Combat"), "A Voz do Povo" (The People's Voice").