The character and decline of party membership 1 The Norwegian party system has remained fairly stable since WWII. Although some minor parties have managed to elect a single MP (like the Greens in 2013), the chapter will focus on the seven main parliamentarian parties (listed in Table 10.1 ). Since 1945, only two new parties have entered and become part of the party system, the Socialist Left Party (SV, founded in 1961, re-organized and renamed in 1973) and the Progress Party (FrP, founded in 1973). The Communist Party was a signifi cant party in the fi rst decade after WWII but has not been represented in parliament since 1961. In terms of numbers, the party system has therefore increased by only one over a 70-year period.