I have a discussion-based assignment and the topic is "analyze the reasons for and the goals of the United Nations" anyone has some good things I should start with and I would appreciate some articles for me to research this as well (unless doesn't let people share links because they don't like people using other resources to study)

Why was the sixteenth amendment important to woodrow wilson’s efforts to regulate the economy? a) the sixteenth amendment lowered interest rates charged by banks. b) the sixteenth amendment allowed congress to levy an income tax c) the sixteenth amendment lowered tariffs on imported goods d) the sixteenth amendment allowed congress to break up monopolies