 In 1987, he joined the Committee for the Defence of Human Rights.He also participated in the so-called May Declaration of 1989, in which a group of Slovenian intellectuals and public activists openly demanded full democratization of the politics of the nation, the introduction of a market economy, and the secession of Slovenia from Yugoslavia.He was one of the co-founders of the Slovenian Democratic Union, one of the first anti-Communist political parties established in 1989.