It would prove to be extremely ineffective. When the United States decided not to join the league, it was primarily made up of weak countries so it didn't have any muscle to enforce anything. This was proven when Japan inbaded Manchuria despite the league trekking then not to. This showed Hitler that without the united States in the league of Nations, there would be nobody to step in and stop Germany from invading Poland in 1939
I think if I am not mistaken it would be the Chernobyl nuclear power plant meltdown in 1986
The Song Dynasty was responsible for inventing and perfecting the first movable type printing press! I hope this helped you in what you were looking for.
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.