Wikipedia (en)
The alt-right, or alternative right, is a loosely defined group of people with far-right ideologies who reject mainstream conservatism in favor of white nationalism, principally in the United States, but also to a lesser degree in Canada and Europe. Paul Gottfried is the first person to use the term "alternative right", when referring specifically to developments within American right-wing politics, in 2008. The term has since gained wide currency with the rise of the so-called "alt-right". White supremacist Richard Spencer coined the term in 2010 in reference to a movement centered on white nationalism, and has been accused by some media publications of doing so to excuse overt racism, white supremacism, and neo-Nazism. The term drew considerable media attention and controversy during and after the 2016 US presidential election.
Alt-right beliefs have been described as isolationist, protectionist, antisemitic, and white supremacist, frequently overlapping with Neo-Nazism, nativism and Islamophobia, antifeminism and homophobia, right-wing populism, and the neoreactionary movement. The concept has further been associated with multiple groups from American nationalists, neo-monarchists, men's rights advocates, and the 2016 presidential campaign of Donald Trump.
The alt-right has its roots on Internet websites such as 4chan and 8chan, where anonymous members create and use Internet memes to express their ideologies. It is difficult to tell how much of what people write in these venues is serious and how much is intended to provoke outrage. Members of the alt-right use websites like Alternative Right, Twitter, Breitbart, and Reddit to convey their message. Alt-right postings generally support Donald Trump and oppose immigration, multiculturalism and political correctness.
The alt-right has also had a significant influence on conservative thought in the United States, such as the Sailer Strategy for winning political support, along with having close ties to the Trump Administration. It has been listed as a key reason for Trump's win in the 2016 election. The Trump administration includes several figures who are associated with the alt-right, such as White House Chief Strategist Steve Bannon. In 2016, Bannon described Breitbart as "the platform for the alt-right", with the goal of promoting the ideology.