Below are topics listed with a few sources to help get your selection process started.
Click the images to explore!

Or click on the category title to pull up an entire page of topics within that category.
A topic's category should not confine your exploration to that topic.
Some topics may be applicable in several categories, they will be listed in their most obvious category.
   
Topics with purple borders indicate topics that fit will within this year's theme:
Frontiers in History: People, Places, Ideas