America has grown disturbingly close to the fascist nation of Oceania from the dystopian political novel Nineteen-Eighty Four by George Orwell. Please remember that these are generalizations and do not apply to every American. (By the way, I am aware that this is long so feel free to skim)

Ministry of Peace - The role of the Ministry of Peace in the novel is to conduct war upon opposing nations. This is pretty straightforward. They are both in a state of perpetual war as a means to drive the economy as well as perpetuate fear among its citizens. This correlates through things like the war on terror, cold war, etc.

Ministry of Plenty - The role of the Ministry of Plenty in the novel is to make sure that nobody other than the upper class has everything that they need. They are also responsible for continuing production within their economy. This is similar to the constant advertising throughout television and other media always telling people that they have to buy a (insert expensive unnecessary item here). As well as the preaching by politicians that the working class are the most important people in America while at the same time cutting wages, raising the taxes for people in the lower class, and phasing out worker's rights.

Ministry of Truth  - The role of the Ministry of Truth in the novel is to spread lies, propaganda, and misinformation. They are in charge of ensuring that none of the citizens know what is really happening. They make sure that everyone is happy living there because they say that everywhere else is much worse. This is similar to the reportings of the news networks across America (FOX, CNN, MSNBC, et al) as well as the government censorship of various documents and media (CIA, FCC, et al) This ensures that Americans not only love their country, but hate everyone who has any feeling of dissent or non-conformity.

Ministry of Love - The role of the Ministry of Love in the novel is to spy, police, and torture. This is in order to keep dissidents under control in order to ensure the Party's dominance. America has many institutions of torture (Abu Ghraib; and others I'm sure) intended to "keep America safe. The government has also been responsible for repressing "riots" and undesirable acts all throughout American history ("don't tase me, dude" incident, 1971 May Day protest, etc). The USA PATRIOT Act gave the government full power to spy on and detain whoever the fuck they want to but it has been happening since before then (Mumia Abu-Jamal, Rodney King, Sherman Austin etc).