By Daniel Waldow, Crisis Magazine - Aquinas’s understanding of politics is based upon his notion of the purpose of human life. Humans yearn for happiness. The natural happiness accessible to all people in this life consists in the exercise of the intellectual and moral virtues. In order to be virtuous, a person first needs to be alive. Then, the living person needs to have morally virtuous relationships with their neighbors, and especially with their spouse and children. Finally, they need to exercise the virtue of religion by worshiping God. Life, love of neighbor, and love of God are thus the three goods which humans need to be happy in this life...