As the exhibition catalogue explains, Greek artist Vassilakis Takis removed one his sculptures from MoMA, claiming that while the museum owned the work, he retained authority over how it should be presented. The statement lead to the formation of the Art Workers' Coalition, a group of artists that, as its first act, delivered its "13 Demands" to Lowry.
"While these demands were not met, the coalition became a force for change in the world," writes Liza Kirwin, the Smithsonian Archive's manuscripts curator, going on to address global and art world issues, from organizing protests against the Vietnam war to successfully pushing for the institution of free days at MoMA and other museums.
Below, via Primary Information, the group's 1969 document, "Does Money Manipulate Art?":