The main way in which the poem, "The White Man's Burden", justifies imperialism to the industrialized world and the unindustrialized world is that it implies that it is the "obligation" and duty of white men in developed and rich countries to colonies poorer countries--in order to implement more "modern" and prosperous forms of government.
On April 2, 1917, Wilson went before a special joint session of Congress and asked for a declaration of war against Germany, stating: “The world must be made safe for democracy.