Fire is one of the most important forces in human history.

Prohibition was an important force in state and local politics from the 1840s through the 1930s.

Today his party remains an important force in the politics of the province.

Tourism has become perhaps the most important economic force in the West.

"They've become a very important force in mental health policy."

Over the years, agriculture became an important economic force in the area.

He has been an important force in the contemporary independent music scene for over 15 years.

And at times he has been an important force for moderation.

That church has become the most important force in our life.

Cities are an important driving force behind development in Europe.