Diplomatic crises between major countries often rock the international stage and affect global stability. In this context, a crisis can arise from a variety of factors, including territorial disputes, economic competition, or ideological differences. The most striking example is the tension between the United States and China, which has existed for decades, covering trade, technology and military issues. One of the main causes of diplomatic crises is the unequal economic power between major countries. When one country feels threatened by the rise of another country, they tend to take defensive steps that can trigger conflict. For example, China’s increasing military capacity in the South China Sea has caused America to strengthen its alliances with countries in the region. This creates an ongoing cycle of tension. In the European context, tensions between Russia and Western countries, especially after the invasion of Crimea in 2014, are a clear example of a diplomatic crisis that led to sanctions and political isolation. Western countries responded with a series of tough economic sanctions against Russia, which in turn soured diplomatic relations and complicated the situation in Ukraine and beyond. Apart from that, diplomatic crises can also occur due to global environmental issues. Debates about climate change and the responsibilities of advanced industrialized countries compared to developing countries often trigger diplomatic tensions. The COP conference, held annually, is an arena where countries try to reach agreement, although they often reach a dead end. Social media also plays an important role in adding to diplomatic tensions. Information that spreads quickly can trigger nationalist reactions or damage a particular country’s international reputation. Fake news or misleading information can easily create negative perceptions and make the situation worse. Large countries are increasingly adopting policies to counter the influence of social media in manipulating international public opinion. Large countries usually have strong diplomatic networks and seek to resolve crises through dialogue. However, there are times when diplomacy stalls, resulting in conflict escalation. Multilateral cooperation through international organizations, such as the UN, is also often a means of easing tensions. Resolutions produced through these institutions reflect collective efforts to address global issues. The influence of military alliances, such as NATO and OPEC, also determines diplomatic dynamics. Member states often have conflicting interests, which can complicate efforts to reach agreements in times of crisis. Assertion of power through collective defense agreements becomes a focal point in risk management. Geopolitical uncertainty resulting from diplomatic crises often impacts global markets, triggering commodity price fluctuations and affecting foreign investment. Investors tend to look for a stable environment in which to invest their money, and a crisis can cause massive investment withdrawals. Finally, it is important for major powers to manage diplomatic crises tactfully. Preventive diplomacy, which includes open communication and strengthening trust, can help defuse tensions before they escalate into larger conflicts. Building strong communication channels between countries, especially in times of crisis, is key to creating long-term peace and stability.