Charles E. Ruthenberg, born on this day in 1882, was an American Marxist politician and co-founder of the Communist Party USA, an influential exponent of communism in the early 20th century United States.

Ruthenberg also contributed material to the official organ of the Socialist Party of Ohio, The Ohio Socialist, and edited various socialist newspapers. During the 1910s, Ruthenberg traveled to many cities throughout the American Northeast and Midwest, speaking to labor groups, trade union organizations, and anti-war groups, building a network of contacts.

After the U.S. entered World War I, Ruthenberg publicly condemned the war as imperialist, as well as America's participation in it. In connection with a speech he gave at a May 17th, 1917 rally, Ruthenberg was accused of obstructing the draft and sentenced to time in prison under the Espionage Act.

Shortly after his release from prison, he participated in the 1919 Cleveland May Day march, attended by over 20,000 people. The police attacked the protesters, killing two and injuring hundreds.

"Bolshevism — what fear and anger the word arouses in the minds of the rulers of society!"

- C. E. Ruthenberg