Noah Feldman

A constitutional tradition that works is one that is in a constant state of dynamic evolution. You have a written constitution that says 'x,' but no constitutional system works if it just follows what's in that written constitution and never changes. Interpretation gives it the freedom to change.

William O. Douglas married not one, not two, not three, but four hot blondes. He was not faithful to any of them, not even the last, and each was younger than the previous woman... But after his personal life began to actually fall apart, he developed a set of values about the Constitution that turned out to maximize our autonomy and freedom.

The Chinese public is deeply nationalist, which matters to China's unelected political leadership as much as U.S. nationalism does to American politicians. As China becomes the world's largest economy, there is meaningful public pressure for its power status to advance in parallel. Any alternative would be humiliating.

The historical novelist has to consider what has actually happened, while the SF writer is dealing in possibilities, but they are both in the business of imagining a world unlike our own and yet connected to it.