Principles of Foreign Policy -- Part 2

I began this series of posts with a preview:

I believe we have real interests in the world that we have to defend. Defending those interests is only possible if we have a global military presence. We face real enemies in the world because our historical actions have placed us in conflicts with people that don't like us, but it's wishful thinking to assert that we could have avoided these conflicts in the past and it's foolhardy to pretend that we can avoid more such conflicts in the future. This is especially true because many of our worst enemies in the world are irrational operators whom we can't consistently influence without a credible threat of force.

Let's take a look at that first statement: what interests does America have that are worth defending with an interventionist foreign policy?

Commerce: we trade with virtually everybody which means Americans and American properties are everywhere, our economy relies on natural resources such as oil, and our prosperity is based in part on a global trade network that is only possible when stability throughout the world allows sea lanes to stay open and global trade to flow freely [1].

Power: All other things being equal, when America faces threats we are better able to deal with those threats if we have more power. Not every opportunity to gain power is worth the price, but sometimes it is absolutely true that we are better off paying a price to gain or maintain power. Additionally, power is only useful if there is a credible possibility that the power will be used. If we are forever demonstrating an absolute unwillingness to use our power, our enemies will learn that it is safe to ignore our power and attack our interests [2].

Honor: we are better off in a world in which we have many friends that want to cooperate with us and few enemies that want to harm us. This means that we have to preserve a reputation for being a good friend as well as a reputation for being a dangerous enemy. If we renege on promises to friends or we
demonstrate a willingness to back down in the face of provocation, we will find ourselves with fewer friends and more enemies [3].

[1] The Pentagon's New Map
[2] While America Sleeps
[3] On the Origins of War