This is the first of six brief videos about Catholic moral teaching on violence and war. Designed for use in a high school or college classroom, these 5 - 10 minute videos offer a context for the teaching, explain the tradition's seven criteria, and offers a critique. Note that in Catholicism this teaching is now known as the Just Defense Theory... The six videos are: (1) Introduction, (2) Jesus and the Early Church, (3) St. Augustine, (4) The Just Defense Theory (criteria), (5) Objections to the Just Defense Theory, and (6) Epilogue.