The south treated their slaves much more fairly than the deep southern states. (South example: North Carolina) (Deep South example: Georgia, South Carolina) Maryland treated their slave fairly, and they were considered a northern state.
There are many products that the Europeans brought from the North and South America. From the North, it was predominantely fur from beaver, fox and mink etc. as well as bison hides. Local medicinal plants was also very popular. From the Central America, they brought tobacco, cocoa beans and food such as corn, beans, pumpkins berries and so on. What Europeans gave in return were horses, guns, iron tools and utensiles, rum and textiles that were not availble to the local Indians.
What caused World War One was the assasomation of arch duke fracas Ferdinand