That statement is false.
Most people will actually accept it. When faced with majority opinion, a group member tend to feel an enormous pressure to conform so they feel that they are accepted as 'one of the members' of the group
The book: American Slavery As It Is, is a book that goes into the details and facts of the devastating effects of slavery. Hope that helps.
Unrestricted submarine warfare, which became prominent in World War I, meant that submarines could sink any time of vessel at any time without warning. Before this, they had to surface first and place crews on lifeboats.
Harriet Tubman aided slaves from the south to escape their captors. She courageously set up the Underground Railroad by marking trees, and whites who opposed slavery set up “safe houses” she also informed that if a slave were to get lost, to look towards the sky and find the North Star.