Yes, not just political views. As you say, the mentally ill would be one targeted group, former criminals would be another, etc... The most divisive issue would probably be whether those living in poverty would be given the license.
> "In order to have a license the criteria would have to be crystal clear and added to the Constitution (sorry, US-centric). And even if in the Constitution, someone could abuse it (see: NSA, surveillance)."
At most, I could imagine the benefits of taking precautions against accidental pregnancies (vasectomies, etc...), but only as long as those measures would be reversible at any time. I could also see the need for encouraging single child families as the least draconian method of population control (should overpopulation ever become a big issue). Anything beyond that strikes me as a step too far.
It is vastly oversimplifying, and prejudicial, to say something like that.
Many more people than you seem to think have experienced, or will experience mental illness in their life.
http://www.nimh.nih.gov/health/statistics/prevalence/any-men...
> Most people would agree that mentally ill people should not have children.
Turns out the definition of mental illness covers far more than the most extreme/visible cases so it will be unclear where to draw the line since "mental illness" is too broad a set
Huh? They would? Are you sure about that?
Most people would agree that mentally ill people should not have children.
But what constitutes mentally ill? The line is fuzzy - perhaps someone is just a bit "quirky", but still could be a good parent?
In order to have a license the criteria would have to be crystal clear and added to the Constitution (sorry, US-centric). And even if in the Constitution, someone could abuse it (see: NSA, surveillance).