The media and communication strategies of two particular ideologies are focused on herein: right-wing extremists and violent jihadis – albeit an array of others is referred to also (e.g. nationalist-separatists such as the Irish Republican Army (IRA) and violent Islamists such as Hezbollah). Violent jihadists are inspired by Sunni Islamist-Salafism and seek to establish an Islamist society governed by their version of Islamic or Sharia law imposed by violence (Moghadam, 2008). Right-wing extremists may also subscribe to some radical interpretation of religion, but unlike those inspired by radical Islam, many extreme right adherents are not inspired by religious beliefs per se. Instead, what binds these actors is a racially, ethnically, and sexually defined nationalism, which is typically framed in terms of white power and grounded in xenophobic and exclusionary understandings of the perceived threats posed by such groups as non-whites, Jews, Muslims, immigrants, homosexuals, and feminists. Here the state is perceived as an illegitimate power serving the interests of all but the white man and, as such, right-wing extremists are willing to assume both an offensive and defensive stance in the interests of “preserving” their heritage and their “homeland” (Perry & Scrivens, 2016). With regard to the chapter’s structuring, the following sections are ordered chronologically, treating, in turn, early low-tech communication methods or what we term ‘pre-media,’ followed by other relatively low-tech tools, such as print and photocopying. The high-tech tools reviewed are film, radio, and television, followed by the Internet, especially social media.