To promote harmony between the two or more countries. To promote International peace. To make the whole world a small global village. The duties and responsibilities of any individual country are well set. The violations can be dealt with some common effort in the form of sanctions etc. Sometimes even with military intervention. For effective trading among countries to bolster their economies. Finally every country has to contribute little or more in money and effort for the existence of that International Organisation . 

Introduction:
International organizations play a crucial role in today's interconnected world. They are established to foster cooperation, coordinate efforts, and address global challenges that transcend national boundaries. These organizations serve as platforms for member countries to collaborate and find collective solutions to shared problems. Let us delve into the reasons why we need international organizations.

Promoting Peace and Security:
One of the primary purposes of international organizations is to maintain peace and security among nations. Organizations such as the United Nations (UN) and the North Atlantic Treaty Organization (NATO) work towards preventing conflicts, resolving disputes, and promoting diplomatic negotiations. By providing a neutral ground for dialogue, these organizations help prevent wars and mitigate tensions between countries.

Addressing Global Challenges:
International organizations tackle a wide range of global challenges that require collective action. Issues like climate change, poverty, terrorism, and pandemics demand collaboration among nations to find effective solutions. Organizations like the World Health Organization (WHO), the World Bank, and the International Monetary Fund (IMF) play vital roles in addressing these challenges, providing resources, expertise, and coordination to combat global problems.

Facilitating Trade and Economic Development:
International organizations facilitate trade and economic development by promoting fair and transparent global trade practices. The World Trade Organization (WTO) establishes rules and regulations to govern international trade, ensuring that countries abide by agreed-upon standards. These organizations also provide technical assistance and financial support to developing countries, enabling them to participate in the global economy and fostering economic growth.

Protecting Human Rights:
International organizations play a crucial role in protecting and promoting human rights globally. The United Nations Human Rights Council (UNHRC) monitors and addresses human rights violations worldwide, advocating for justice and equality. Through conventions, treaties, and resolutions, these organizations set standards and guidelines to safeguard the rights and dignity of individuals, regardless of their nationality or background.

Providing Humanitarian Aid:
During times of crisis and natural disasters, international organizations play a vital role in providing humanitarian aid. Organizations such as the International Red Cross and Red Crescent Movement, the United Nations Children's Fund (UNICEF), and the World Food Programme (WFP) deliver relief assistance, medical aid, and essential supplies to affected regions. They coordinate efforts, mobilize resources, and ensure timely assistance reaches those in need.

Promoting International Law and Cooperation:
International organizations contribute to the development and enforcement of international law. They facilitate legal frameworks and treaties that govern relations between nations, ensuring adherence to agreed-upon rules. These organizations also promote cooperation by providing platforms for dialogues, negotiations, and diplomatic engagements, fostering understanding and harmony among member countries.

Conclusion:
International organizations are essential for addressing global challenges, promoting peace and security, protecting human rights, and fostering economic development. They serve as crucial platforms for nations to collaborate, coordinate efforts, and find collective solutions. In an increasingly interconnected world, these organizations play a vital role in shaping a better future for all.

The Role of international organizations in World Politics. ... It is widely believed international organization should be responsible for the maintenance of international peace and stability, be this economic, social or political, and that they should  act in the interest of the international community.