He will be found to have been most unstable and reckless.

Power is the most unstable of all human achievements.

He had yet to be able to tell which was the most unstable.

You think power may be the most unstable of all human achievements?

"Such a trial, given the impact upon Arabs, is a natural target for an act of terrorism in this most unstable environment."

It's the most unstable the college has been since I arrived 40 years ago.

In politics, the tripod is the most unstable of all structures.

During the most unstable times, a visit to the troops was a death warrant for the emperor.

He was the most unstable kind of fool I had ever seen.