Faculty can be a pretty serious force when they believe in the rightness of something like this.

Over the years interest and respect mounted, but the rehabilitation did not gain serious force until the 1970s.

Sextus soon became a serious force in the civil war following Caesar's death.

But all that dancing around wouldn't help them much against any serious defensive force.

How could such a person become a serious political force in the United States?

He would've been a fool to think there weren't some serious forces behind all this.

On the other hand, serious forces of nature are at work inside them.

These are serious forces we're playing around with here.

The fact that serious political forces join in such an initiative is reason for hope.

The West's serious military forces did what was needed to be done to confront terrorism.