“Death to Wage Slavery!”

The Three Sources and Three Component Parts of Marxism http://www.marxists.org/archive/lenin/works/1913/mar/x01.htm (March 1913)
1910s
Context: Throughout the civilised world the teachings of Marx evoke the utmost hostility and hatred of all bourgeois science (both official and liberal), which regards Marxism as a kind of “pernicious sect”. And no other attitude is to be expected, for there can be no “impartial” social science in a society based on class struggle. In one way or another, all official and liberal science defends wage-slavery, whereas Marxism has declared relentless war on that slavery. To expect science to be impartial in a wage-slave society is as foolishly naïve as to expect impartiality from manufacturers on the question of whether workers’ wages ought not to be increased by decreasing the profits of capital.

Source: The Drawing of the Dark (1979), Chapter 10 (p. 140)

Source: Forbidden

Source: The Golden Apple

As quoted in "Revering Sam Houston, anti-Confederate patriot" http://grandoldpartisan.typepad.com/blog/2016/03/sam-houston.html (18 March 2016), by Michael Zak, Grand Old Partisan
1860s

Source: Witches Abroad

On the American Civil War (1861); as quoted in Afro-American Writing: An Anthology of Prose and Poetry http://books.google.com/books?id=qPW8i99nuvEC&printsec=frontcover#v=onepage&q&f=false, by Richard A. Long.
1860s

Book I, section 150; translation by Walter Miller
De Officiis – On Duties (44 BC)