I don't understand the question
Answer:
It is estimated that by the early 16th century as much as 10% of Lisbon's population was of African descent. After the European discovery of the American continent, the demand for African labour gradually grew, as other sources of labour - both European and American - were found to be insufficient.
The United Nations replaced the League of Nations. The League of Nations was a cross-country entity that was composed of many countries in Western Europe and also elsewhere that was supposed to regulate certain aspects of life that were important for all countries on Earth. However, it turned out there were certain key shortcoming of this union of nations, and later the United Nations were developed.
