When the countries are failing, that means they at their own are unable to create success, and hence require guidance and support of others. After WW11, US financed to lift the entire Europe out of poverty, and helped them made what they are today. Take the example of Afghanistan, where dozens of countries are helping them, because they are no longer on other planet, rather are part and parcel of this global village where the world peace is and would be heavily relying on mutual sharing and support of each other.