Final answer:
Multilateralism is the idea that major nations can accomplish common goals by working together, promoting collaboration, mutual respect, and cooperation among nations. An example is the United Nations.
Step-by-step explanation:
Multilateralism is the idea that major nations can accomplish common goals by working together. It is the opposite of unilateralism, which is the belief in going it alone. Multilateralism encourages collaboration, mutual respect, and cooperation among nations to tackle global issues and achieve shared objectives. An example of multilateralism is the United Nations, where member nations work together to promote peace, security, and development.