Before one can engage in social engineering, one must have reliable information about the society that is to be engineered, and one must have effective tools to carry out the engineering. Both of these only became available relatively recently - roughly within the past one hundred years. The development of social science made it possible to gather and analyze information about social attitudes and trends, which is necessary in order to judge the initial state of society before an engineering attempt and the success or failure of that attempt after it has been implemented. At the same time, the development of modern communications technology and the media provided the tools through which social engineering could be carried out.
While social engineering can be carried out by any organization - whether large or small, public or private - the most comprehensive (and often the most effective) campaigns of social engineering are those initiated by powerful central governments.
Extremely intensive social engineering campaigns occurred in countries with authoritarian governments. In the 1920s, the government of the Soviet Union embarked on a campaign to fundamentally alter the behavior and ideals of Soviet citizens, to replace the old social frameworks of Tsarist Russia with a new Soviet culture, to create the New Soviet man. The Soviets used newspapers, books, film, mass relocations, and even architectural design tactics to serve as "social condenser" and change personal values and private relationships. Similar examples are the Chinese "Great Leap Forward" and "Cultural Revolution" program and the Khmer Rouge's plan of deurbanization of Cambodia. In Singapore, the government's housing policies attempt to promote a mix of all races within each subsidized housing district in order to foster social cohesion and national loyalty while providing the citizens with affordable housing.
Non-authoritarian regimes tend to rely on more sustained social engineering campaigns that create more gradual, but ultimately as far-reaching, change. Examples include the "War on Drugs" in the United States, the increasing reach of intellectual property rights and copyright, and the promotion of elections as a political tool. The campaign for promoting elections, which is by far the most successful of the three examples, has been in place for over two centuries. Social theorists of the Frankfurt School in Weimar Germany like Theodor Adorno had also observed the new phenomenon of mass culture and commented on its new manipulative power, when the rise of the Nazis drove them out of the country around 1930 (many of them became connected with the Institute for Social Research in the United States). The Nazis themselves were no strangers to the idea of influencing political attitudes and re-defining personal relationships. The Nazi propaganda machine under Joseph Goebbels was a synchronized, sophisticated and effective tool for creating public opinion.
In a similar vein the Greek military junta of 1967-1974 attempted to steer Greek public opinion not only by propaganda but also by inventing new words and slogans such as: palaiokommatismos (translated as old-partyism), Ellas Ellinon Christianon translated as: Greece of Christian Greeks, Ethnosotirios Epanastasis translated as Nation-saving Revolution meaning coup d'état etc.
Social engineering can be used as a means to achieve a wide variety of different results, as illustrated by the different governments and other organizations that have employed it. The discussion of the possibilities for such manipulation became especially active following World War II, with the advent of television, and continuing discussion of techniques of social engineering - particularly in advertising - is still quite pertinent in the western model of consumer capitalism.