Your topic should be educational for your audience.
Try Gale eBooks for topic overviews, or the Biography database for information about notable people.
The following article databases can help you find newspaper, magazine, and scholarly research articles on your topic.
You can also use the Narrow by Subject feature on the List of All Databases to locate other specialized databases for your topic.
These databases can help you select and narrow a topic, and to find opinion articles to support your argument.