“They have the guns, we have the poets. Therefore, we will win.”

Often attributed to Stalin, there is not a single source which show that Stalin said this at any given time. There is only one source outside the blogosphere which attributes the quote to Stalin, but does not provide any evidence for the attribution. That source is the book Quotations for Public Speakers : A Historical, Literary, and Political Anthology (2001), p. 121 by the former US senator Robert Torricelli.
Misattributed

The Modern Traveller (1898)

As quoted in " Joe Hockey calls for stability in farewell speech to Parliament " in news.com.au (21 October 2015) http://www.news.com.au/finance/work/joe-hockey-calls-for-stability-in-farewell-speech-to-palriament/story-fn5tas5k-1227576868232

Depa Billipa and Mace Windu, p. 313
Shatterpoint (2004)

"Meet the Senator Who Filibustered for 15 Hours on Gun Control" http://www.rollingstone.com/politics/news/meet-the-senator-who-filibustered-for-15-hours-on-gun-control-20160620, RollingStone.com, 20 June 2016.

2010s, Nobel Prize winner highlights women’s role in Arab Spring (2011)

The Plan of Delano (1965)
Context: We are suffering. We have suffered, and we are not afraid to suffer in order to win our cause. We have suffered unnumbered ills and crimes in the name of the Law of the Land. Our men, women, and children have suffered not only the basic brutality of stoop labor, and the most obvious injustices of the system; they have also suffered the desperation of knowing that the system caters to the greed of callous men and not to our needs. Now we will suffer for the purpose of ending the poverty, the misery, and the injustice, with the hope that our children will not be exploited as we have been. They have imposed hunger on us, and now we hunger for justice. We draw our strength from the very despair in which we have been forced to live. We shall endure.

1990s, Interview outside courthouse (1994)

Presidential campaign (April 12, 2015 – 2016), First presidential debate (September 26, 2016)