(OSV News) -- For plummeting worldwide fertility rates to change course, people must find courage to "do the hard thing" of raising large families, and that courage comes from faith, said Catherine Ruth Pakaluk, an economist at The Catholic University of America in Washington. "We live in a society that it's just so easy not to have children," said Pakaluk, author of "Hannah's Children: The Women Quietly Defying the Birth Dearth," published March 19 by Regnery Gateway. Her research -- based on open conversations with college-educated women who have five or more children -- indicates that religious faith is a major motivator for having children. She said this shows an importance to change people's hearts about the value of children…