It seems once you land find one archive the rest sort of wander over to great you. On Google News there is a collection archive of scanned newspapers from various dates, cities and countries.
There are newspapers from the 1800s and 1900s as well as through the depression era and the 1960s in the US. Some of the newspapers only contain one issue and others have a full collection of publication.
It really is entertaining to read some of the early issues of various newspapers. The Covington Journal mission is to "cover politics, literature, education, agriculture and the news of the day."
You can perform a keyword search to find topics of interest. Keep in mind that usage and terminology has changed over time.
For example, suffrage was used in connection with slavery and then freed men and women. It later became a term connected to woman's suffrage. The term womens liberation came into use much later.
If you are looking for historical comparisons today's hot topics this is one of the places you should considers investigating.