The open networks of the early twenty first century were defended by the best human minds and coders humanity had yet created. But humanity has never been as open with each other as our best minds wished we would be. Religious, racial, and national identities waged battles of closed minds with each other. And if there were many who made friends across the globe, there were more who made enemies. Words became their weapon of choice, and when those who disagreed refused to surrender, the imposition of silence became the next.