Do intergovernmental organizations promote peace in the world?

After WWII (Second World War) humanity decided to create intergovernmental organizations to control security throughout the world. Intergovernmental organization (IGOs) is defined as an “organization composed primarily of sovereign states (referred to as member states), or of other intergovernmental organizations. Intergovernmental organizations are often called international organizations, although that term may also include international nongovernmental organization such as international non-profit organizations (NGOs) or multinational corporations.