Christian conservative Mat Staver warns that allowing gay and lesbian couples to marry could doom Western civilization.

Staver, who heads the Christian conservative Liberty Counsel, made his comments in speaking at the American Decency Association's summer conference.

“Redefining marriage,” Staver, told the audience, would bring with it consequences.

“It doesn't matter how many opinions or how many votes you have for that, you can't change God's natural created order,” said Staver, a long-time opponent of gay rights.

“We've never been in this situation before. We will not be able to escape the coercive nature of this issue. It is cataclysmic in its change effect. It is, I believe, ultimately the beginning of the end of Western Civilization, if we adopt this as a country,” he added. (The video is embedded on this page. Visit our video library for more videos.)