Unique among major First World countries, Australia has compulsory voting.
It might not be a bad idea to have a basic civics exam as a requirement for voting. Government of, by and for the stupid will not long endure. In the age of CNN and Facebook and mal-education, that is the default voter. For those who fail the civics exam, there can be voters ed classes, just like there is driver’s ed for motorists who run stop signs or pass school buses unloading students.