Litmus test or essential insights or civic cirriculum, whaterever. The point is that one should have an adequate knowledge about a subject before offering or advocating positions and actions concerning those subjects. Some of my personal favorite include:

Taxes

Corporations;

Money, banking, economics and finance

The Boston Tea Party

Firearms and the ATF

The realities of the USPS

Forbes published a fun page that enables one to scroll through a couple of decades of the wealthiest. In 1983 there were just 13 billionaires. Today there are more than 1200. How has that happened? What are the implications?

Not only are a small number of people obscenely wealthy, corporations have made more money than ever. The Business Insider helps show these trends. The Heritage Foundation tells us we're all doing better. ...it's a nice piece of propaganda.