Russia's invasion of Ukraine has, at the time of writing, been going on for over 14 months. Despite diplomatic efforts and international cooperation, no attempts have so far succeeded in reaching a peaceful end to the conflict. This study has aimed to investigate and analyze the factors that limited the diplomatic success of the international institutions in the conflict between Russia and Ukraine. The study has used neoliberal institutionalism as a theoretical framework to analyze and answer the question. This theory has been very helpful in identifying what flaws there may be in international systems that can affect conflict solutions. The study has analyzed a selection of factors which, according to a balance based on political relevance and theoretical starting points, are considered to be significant factors. The factors that have been analyzed are territorial, military, security policy and institutional as well as factors around international collaborations. The study's discussion shows how these factors played a role and in what way the limitations they led to may have affected the success of conflict resolution and may affect future conflicts and outcomes. The discussion also highlights the relevance and importance of a functioning and actionable international system based on the theoretical perspective. The study has contributed to highlighting important factors surrounding the Russia-Ukraine conflict that are relevant both to the case itself and to future conflicts.