The direct cause of WWI was the assassination of Archduke Franz Ferdinand at Sarajevo on 28 June 1914. However historians feel that a number of factors contributed to the rivalry between the Great powers that allowed war on such a wide-scale to break out.
The farmers of northern alliance wanted a natural alliance to include African American members. It was a financial movement which came into existence in 1875. The farmers of the United States of America were part of this movement and several other political organizations also involve themselves in this organization.
The reason behind this movement was to abolish or end the negative effects of crop-lien system (a credit system) on farmers in the period after the American Civil War and save the rights of the American farmers.
One very negative consequence of increased feelings of nationalism after WWI was the rise of fascism or so-called national socialism in countries like Germany and Italy. These governments appealed to nationalism and blamed such groups as the Jewish people for their economic problems in the late 20's and early 30's and also believed they had the right to invade and control other countries.
B because the trail of tears required the Indians to settle other places