The Asian immigrants faced many problems in the early 1900's. Firstly, discrimination. Secondly, separation from family. Thirdly, difficulty making a living. Lastly, detention at Angel Island.
The British Channel gave Britain a great advantage. At one point, the German Luftwaffe (air force) tried to invade the island, but the attempt failed and it was never attempted again
Before the slave trade, African culture was agricultural and advanced. The African slave trade started when the leaders of European countries wanted to find new land. Slavery started for many reasons like money, greed, and high demand for labor.