1917 was a pivotal year for propaganda and social psychology. The emerging science and understanding of how to control mass thought were used to talk Americans into supporting WWI in Europe. Some of those who opposed this orchestrated "national" effort--were arrested and imprisoned. Sound familiar?
*Reference: "PR! A Social History of Spin" by Stuart Ewen (1996)
*Graphic: US National Security Agency Poster (Circa 1950-1970)