The use of women, children and immigrant allowed industrialists and factory owners to keep wages low for native born men. This was an important catalyst for the organization of labor unions, Children often worked long hours for low pay. The same was true of women and immigrants.
Bartering and raiding. They never had a merchant system.
What became the largest slave state in the world, and the destination of over half of all African slaves?
Brazil
The correct answer is Barcelona, which is the location of one branch of the Picasso Museum.