A monarchy is like a man-of-war--bad shots between wind and water hurt it exceedingly; there is danger of capsizing. But democracy is a raft. You cannot easily overturn it. It is a wet place, but it is a pretty safe one.
If Brideshead Revisited is not a great book, it's so like a great book that many of us, at least while reading it, find it hard to tell the difference.