This research paper examines the role of responsible and irresponsible leadership in two major crises: the Cuban Missile Crisis and the Russia-Ukraine War. The paper provides a background and context for responsible leadership and an overview of the two crises. The purpose and significance of the research paper are discussed, along with an analysis of the leadership style of key figures in each crisis. The paper evaluates how President Kennedy's responsible leadership approach contributed to a successful resolution of the Cuban Missile Crisis and how Khrushchev's irresponsible leadership approach contributed to an escalation of the crisis. Similarly, the paper examines how President Putin's responsible leadership approach contributed to a more stable and peaceful resolution of the Russia-Ukraine War, while Yanukovych's irresponsible leadership approach contributed to the destabilization of Ukraine. The paper concludes by discussing the importance of responsible leadership principles in crises, highlighting how leaders who prioritize transparency, ethical decision-making, and a commitment to promoting the broader social, economic, and environmental interests of the population can build trust, reduce tensions, and promote peaceful solutions. The paper also highlights the consequences of leaders who prioritize their own interests over the broader interests of the population, disregard democratic norms, and engage in deceptive or unethical behavior, which can contribute to instability, escalation, and conflict. Overall, this research paper contributes to a better understanding of the impact of responsible and irresponsible leadership in crises and highlights the need for leaders to prioritize responsible leadership principles in all aspects of their decision-making process, particularly during times of crisis.