Does contemporary international law offer sufficient and effective means to prevent any future secession by national minorities? In order to answer this question, general international instruments concerning minority-protection, as well as more recent international instruments designed specifically for the protection of minorities, will be investigated. The role that a guaranteeing of collective and, in particular, political rights to national minorities have or can have in order to prevent future secession by national minorities, will be given special consideration. It will be concluded that, in the author's view, the above-mentioned question must be answered negatively, and that an extension of political and collective rights for national minorities is needed, in order to enable a prevention of future secessionist claims by national minorities.