Francisco de Goya, "Saturn Devouring His Son," oil, 1819-1823; original in the Prado, Madrid; this image public domain from Wikipedia.
See also Thomas W. Benson, Posters for Peace: Visual Rhetoric and Civic Action (University Park: Penn State University Press, 2015).
Most of the student- and faculty-made antiwar posters circulated from the Berkeley campus in May 1970 were anonymous. Some time later, Jay Belloli revealed his authorship of "Amerika Is Devouring Its Children." Belloli had been an undergraduate art history major at Stanford who in 1970 was an art history graduate student at Berkeley. See his recent YouTube account of his work.