In this Reason book review of The Child Is the Teacher: A Life of Maria Montessori, by Cristina De Stefano, I argue that while would not be accurate to call Montessori a libertarian, perhaps more than anyone else, she advanced a "libertarian view of children." Montessori's ideas about education stem from the principles of choice, individual dignity, spontaneous order, experimental discovery, and freedom of movement. They stand in radical contrast to traditional schooling, too often based on authority, central planning, rigid instruction, and force. De Stefano has written the most gripping account yet of Montessori’s heroic and tragic life.