There are library databases that have information about the kinds of topics that you might choose for an argumentative paper or speech. These would be social problems or topics in the news like abortion, drug legalization, and so on. Here are two of the best:
Social issues like school violence, drugs, and abortion, are presented in a pro-and-con format in this collection of articles from journals, magazines, and newspapers.
Database covering over 600 controversial topics in the news since 1995. Chronologies, illustrations, maps, tables, sidebars, bibliographies and contact information augment the balanced, accurate coverage of current and historical events.
