Stupidity Wards/Camps

By now it has become blatantly obvious: Much of the world population has shit for brains. Their voices decides what sells, and even what president will win the elections. This is a national crisis! We must take extreme measures to ensure the future of our country, even our world! Incarcerate anyone with an IQ below 100! For the sake of humanity, give them a good life, but segregate them from the intelligent ones, and let intelligence, not age, be a factor in the informed concent to have sex or breed! We are being run over with living cancer! If this cancer reaches our nukes, we will blow up the world! Don't let this happen!

Sounds good, but the devil is in the details.  How do you define IQ? Is that the ability to do differential equations in your head, run 100 meters in less than 10 seconds, or play piano flawlessly?