He graduated from the University of Niš Faculty of Law and was a member of the non-governmental organization G17 Plus prior to its registration as a political party.
[1] In 2000, the GSS joined the Democratic Opposition of Serbia (Demokratska opozicija Srbije, DOS), a broad and ideologically diverse coalition of parties opposed to Slobodan Milošević's administration.
Milošević was defeated by DOS candidate Vojislav Koštunica in the 2000 Yugoslavian presidential election, a watershed moment in Serbian politics.
[5] (From 2000 to 2011, all mandates in Serbian parliamentary elections were distributed to candidates on successful lists at the discretion of the sponsoring parties or coalitions, irrespective of numerical order.
[9] The GSS contested the 2003 Serbian parliamentary election on the electoral list of the Democratic Party (Demokratska stranka, DS), and Radulović was included in the 221st position.