This was a central theme of the President's 1992 campaign.

The drive for change is a central theme in his work.

The shape and design of the books are the central theme.

But he has not made it the central theme of his campaign.

The article eventually became a central theme for the book.

There is a central theme about information as a means to power.

He often raised questions about the free will of the individual as a central theme.

Let me make a general point on the relationship between trade and human rights, which is a central theme of this report.

But, like many Republicans, he has not made the issue a central theme.

A year and a half ago, I could see the two central themes clearly.