Propaganda

Propaganda

manipulation of information, ideas, or rumors deliberately spread widely

to help or to harm a certain person, group, movement, institution, nation,etc.

example:

Gabriel Tarde's Laws of Imitation (1890) and Gustave Le Bon's The Crowd: A Study of the Popular Mind (1897)

were two of the first allocation of propaganda techniques

http://en.wikipedia.org/wiki/Propaganda

http://climatechangeaction.blogspot.com/2008_01_01_archive.html