The deadly violence on the streets of Charlottesville, Virginia, comes at a time of a dramatic rise in prominence of far-right movements in the US.
The election of Donald Trump to the White House has been cited as a factor in the re-energizing of activists and groups in America that reject both left-wing ideology and mainstream conservatism.
Social media is also said to be playing a large part in promoting these ideologies.
A prominent US civil rights group, the Southern Poverty Law Center (SPLC) says that it is currently tracking more than 1,600 extremist groups in the country.