Between 1870 and 1916, approximately how many immigrants came to the united states? 10 million 25 million 75 million 125 million

Nationalsim led to major conflicts following world war1 especially when

What change took place in the african slave trade in the 1500's?

Due to what conditions were slaves brought into brazil to work the fields? the climate was similar to that of africa. the indigenous workers were hired as managers. the indigenous workers had died from exposure to diseases from europe. slaves from africa were already used in other regions and brazil was the next location.