 Pučnik's article was centred on issues of democratization and political plurality, and openly stressed the need for Slovenia's full sovereignty in order to secure such development.He returned to Slovenia in 1989 at the invitation of the newly formed opposition Social Democratic Union of Slovenia.He was elected president of the party in 1989 and the following year he was chosen as the leader of the Democratic Opposition of Slovenia, a common platform of all democratic opposition parties in Slovenia.