In the constitution the Founding Fathers used the ownership of property as a “measure of understanding” while that wouldn’t work in today’s world is there something that might ? Do we ignore the problem until the republic and our freedoms are gone or do we do something about it ?
Ah. So you're asking the question instead of making a statement. You're writeup isn't clear.
I believe we have other far more serious problems that will bring about our demise first.
As to changing the law, can you imagine a politician running on a platform to limit the number of voters by a test of their constitutional knowledge? At this point we'll never make a change like that without a revolution.