Conservatives give more than liberals. Surprised?

This is obvious. No? Even the liberals, in their heart of hearts, know it is true.

Brooks has written a book that concludes religious conservatives donate far more money than secular liberals to all sorts of charitable activities, irrespective of income.

In the book, he cites extensive data analysis to demonstrate that values advocated by conservatives -- from church attendance and two-parent families to the Protestant work ethic and a distaste for government-funded social services -- make conservatives more generous than liberals.

The book, titled "Who Really Cares: The Surprising Truth About Compassionate Conservatism" (Basic Books, $26), is due for release Nov. 24.

When it comes to helping the needy, Brooks writes: "For too long, liberals have been claiming they are the most virtuous members of American society. Although they usually give less to charity, they have nevertheless lambasted conservatives for their callousness in the face of social injustice."

The questions is, what makes a conservative more generous? God? Something else?