Viet-Nam is far away from this quiet campus.We have no territory there, nor do we seek any. The war is dirty and brutal and difficult. And some 400 young men, born into an America that is bursting with opportunity and promise, have ended their lives on VietNam's steaming soil… We are also there because there are great stakes in the balance. Let no one think for a moment that retreat from Viet-Nam would bring an end to conflict. The battle would be renewed in one country and then another. The central lesson of our time is that the appetite of aggression is never satisfied. To withdraw from one battlefield means only to prepare for the next. We must say in southeast Asia--as we did in Europe--in the words of the Bible: "Hitherto shalt thou come, but no further, his painful road”?
The ideas expressed in the passage above are most consistent with which of the following American policies?