Why did europeans bring to the new world that caused the deaths of millions of native americans

Notice that nuetral belgium is located between germnay and france.how do you think belgium and the rest of the world regarded germany's violation of belgiums neutrality ?

In the united states who was to declare war

1. the publication of uncle tom's cabin, written by harriet beecher stowe, contributed to the start of the civil war by: (1) exposing the dangers of cotton manufacturing (2) intensifying northern dislike of slavery (3) pressuring the president to support emancipation (4) convincing congress to ban the importation of slaves