The great presidents never forget the principle of the republic and seek to preserve and enhance them – in the long run– without undermining the needs of the moment. Bad presidents simply do what is expedient, heedless of principles. But the worst presidents are those who adhere to the principles regardless of what the fortunes of the moment demand.
George Friedman, The Next Decade: What the World Will Look Like
flexibility, ideologues, ideology, rigidity, vision