For decades, the Radical Party was a bastion of anti-clericalism, civil libertarianism, liberalism and radicalism in Italy as well as environmentalism. The party proposed itself as the strongest opposition to the Italian political establishment, seen as corrupt and conservative. Although it never reached high shares of vote and never participated in government, the party had close relations with the other parties of the Italian left—from the Republicans and the Socialists to the Communists and Proletarian Democracy—and opened its ranks also to members of other parties through dual membership.