<P> Socialist parties were organized in order to achieve political rights for workers and were originally allied with liberals . However, they broke with the liberals when they sought worker control of the means of production . Christian democratic parties were organized by Catholics who saw liberalism as a threat to traditional values . Although established in the 19th century, they became a major political force following the Second World War . Communist parties emerged following a division within socialism first on support of the First World War and then support of the Bolshevik Revolution . </P> <P> Right - wing extremist parties are harder to define other than being more right - wing than other parties, but include fascists and some extreme conservative and nationalist parties . </P> <P> Green parties were the most recent of the major party groups to develop . They have mostly rejected socialism and are very liberal on social issues . </P> <P> These categories can be applied to many parties outside Europe . Ware (1996) asserted that in the United States both major parties were liberal, even though there are left--right policy differences between them . </P>

Where does left wing right wing come from