Kammala jumla mai zuwa: Darko shi ne ƙaramin ɗan sanannen likitan Slovene daga Carniola, Franc Ribnikar kuma ɗan'uwan Vladislav Ribnikar. An koyar da shi a Svilajnac da Belgrade. Ya kammala karatunsa a fannin shari'a a Jamus (Berlin da Jena). Bayan mutuwar mahaifinsa, a cikin 1905, ya koma Belgrade don taimaka wa ɗan'uwansa Vladislav tare da "Politika". Shi ne babban editan jaridar amma kuma ya yi aiki a matsayin wakilin musamman a Romania a lokacin yakin basasa.
Tawayen manoma na 1907 da kuma lokacin Friedjung tsari a Vienna a 1909.