I think that it is still marginally conceivable to follow the principles of the Monroe Doctrine. Nowadays, Europe has not been bothering the United States, except for the guidance of their very abundant views. Times have changed, they are no longer isolated from Europe because of a supervisory king. They need to entomb the past and become associates with any possible supporters, because they may need them someday. This also includes not meddling with their governments and countries unless it is completely essential.
