Answer:
A country could be a world leader when meets the following conditions:
Step-by-step explanation:
1.Highest per capita GDP and Grosss National Happiness
2.should have demonstrated ability for world peace and welfare of this planet.
3.The country by itself should be free from corruption,cent percent literacy level, no one Below poverty line per international or best standards, free medical aid ,least inequality of income. In the home country every one should have home /shelter ;zero crime rate.
4. Should have all technological capabilities including Nuclear ones for peaceful purposes. And ability to thwart any attempt of any country to attack any other country.
5.Ability to impress all nations to put forward their best foot forward to make best use of comparative advantage theory for trade exchanges so that interdependence and coexistence is respected and ensured.
5 help all nations to be in sync for Global happiness and welfare.
Hope this helps :)