Your take on the relationship between them is very perceptive, and exquisite in its subtlety. This also applies to your reading of Machiavelli.
He wrote history that looked forward. This is beautifully stated, and I wholeheartedly agree.
Anyway, try out DC buildings some time. You'll be stunned. What people need to remember is that our country is from the beginning purposeful. It's when we lose purpose and instead look to method that we are lost. Here's an example: welfare as a purpose is that no one starve. Welfare as a method is where people use welfare. I see the same in our buildings, one way or another.