Second, intelligence is not required to cast a worthy vote. The majority does not make decisions about the law. This is not ancient Greece, it is the United States. Unlike most governments in history, ours is a unique Constitutional Republic. Even the vaunted public plebiscites of my home state, California, do not become law if they violate any one person's right to life, liberty and property.
Stupid people are perfectly capable of voting wisely.
Because we are a republic, citizens vote for their representatives, not the law. They select people based on their judgment of the candidate's character, intelligence, and ethics. No special knowledge is required to make those decisions. Your ignorance of our basic system of government is not nearly so egregious as your perversion of basic good government principles. We are born equal simply because we are all born human.