During the 1930s, as war clouds gathered over Europe, Maria Montessori became profoundly concerned with the question of peace. The problem of war caused her to engage in a passionate search for new human truths. Taking as her starting point her conviction that the child must be our teacher, she moved on to consider the problems of human and social development and began a crusade in the name of education. This collection of speeches, which she delivered at international congresses and peace councils, vividly reveals why she was nominated three times for the Nobel Peace.