Welcome to The Political Compass [http://politicalcompass.org/]
There's abundant evidence for the need of it. The old one-dimensional categories of 'right' and 'left', established for the seating arrangement of the French National Assembly of 1789, are overly simplistic for today's complex political landscape. For example, who are the 'conservatives' in today's Russia? Are they the unreconstructed Stalinists, or the reformers who have adopted the right-wing views of conservatives like Margaret Thatcher ?
On the standard left-right scale, how do you distinguish leftists like Stalin and Gandhi? It's not sufficient to say that Stalin was simply more left than Gandhi. There are fundamental political differences between them that the old categories on their own can't explain. Similarly, we generally describe social reactionaries as 'right-wingers', yet that leaves left-wing reactionaries like Robert Mugabe and Pol Pot off the hook.
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Plotting all fifty states on-screen would be a visual mess. [http://politicalcompass.org/usstates?ak=on&az=on&il=on&ny=on] However, using the controls below, you can pick any combination of states to display on the chart.
These readings are based on their senators' opinions, NOT on the general public opinion at any given time within the state. This might make some of the readings seem surprising.
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US Presidential Election 2008 [http://politicalcompass.org/uselection2008]
This chart was constructed on the basis of the speeches, public statements and , crucially, the voting records of each of the candidates. When examining the chart it's important to note that although most of the candidates seem quite different, in substance they occupy a relatively restricted area within the universal political spectrum. Democracies with a system of proportional representation give expression to a wider range of political views. While Cynthia McKinney and Ralph Nader are depicted on the extreme left in an American context, they would simply be mainstream social democrats within the wider political landscape of Europe. Similarly, Obama is popularly perceived as a leftist in the United States while elsewhere in the west his record is that of a moderate conservative.
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UK Parties 2008 [http://politicalcompass.org/extremeright]
It's muddled thinking to simply describe the likes of the British National Party as "extreme right". The truth is that on issues like health, transport, housing, protectionism and globalisation, their economics are left of Labour, let alone the Conservatives. It's in areas like police power, military power, school discipline, law and order, race and nationalism that the BNP's real extremism - as authoritarians - is clear.
This mirrors France's National Front. In running some local governments, they reinstated certain welfare measures which their Socialist predecessors had abandoned. Like similar authoritarian parties that have sprung up around Europe, they have come to be seen in some quarters as champions of the underdog, as long as the underdog isn't Black, Arab, gay or Jewish !