The article examines the concept of the Responsibility to Protect (R2P) as a significant international norm aimed at addressing mass atrocities like genocide and war crimes, emphasizing its tripartite structure of prevention, reaction, and rebuilding. The study highlights the application of R2P in the context of the Russo-Ukrainian conflict, noting the challenges posed by the UN Security Council's constraints due to Russia's veto power, and assesses the legal justifications for intervention. Despite imperfections in its implementation, the article affirms the relevance of R2P, advocating for continuous support and a balanced approach between legal rationale and prudential considerations in employing military force.