ABSTRACT
When the US entered the war only six senators out of 88 were opposed. The objection of the pacifist George W. Norris (1861–1942) was enlightening for the understanding of any conflict. Over the years Bernays's observations have been confirmed by the evolution of media and propaganda which favour a conformist society. That is, they adopt the objective of standardizing its thoughts and behaviours by using persuasive psychological principles, thus creating the dose of conformity necessary to facilitate the act of governing. At the beginning of the 20th century, as now one hundred years later, posters were looked upon as a powerful means of persuasion both in the fields of economic and social communication as well as in political propaganda campaigns and for the diffusion of public government information. An aspect with which there is general agreement, is that persuasion is easier to achieve when positive aims of an action or operation are emphasized.
