My friend Patricia just told me about this amazing web library of drawings by Rini Templeton, who spent 20 years capturing in art form the struggles of grassroots activists in the United States, Mexico, and Central America. She called her bold black-and-white drawings "xerox art" because activists and organizers could copy them easily for use in their banners, signs, leaflets, newsletters, even T-shirts, whenever needed. She almost never signed a drawing (and she produced thoursands of them) and so while her style is widely recognized, her name is not. Rini died in Mexico in 1986. Her sister and supporters continue to make her art available, for free, through the web-library. Activists serving causes that Rini would have supported are invited to use her drawings freely in their leaflets, newsletters, banners, and picket signs or for similar non-commercial purposes. The images are neatly organized into categories by theme, and each image comes with a description explaining its content so you can better understand Rini's inspiration for each. The art itself (I imagine like Rini's life must have been) is bold, moving, sublime. Check it out.
Here's a little bit of Rini's biography (from the website):