Decades ago, if you heard that a group of family-focused Christian conservatives did a lecture series called Resisting the Green Dragon, you might have thought it was part of the war on drugs. But today, the attacks are against a 21st-century threat: Environmentalism. The campaign targets groups like Greenpeace and environmental lobbies who, they say, make nature a priority over people and are taking over classrooms, political bodies and society as a whole. "Today's environmentalism isn't a neutral set of ideas that can be tacked onto the Christian faith without theological compromise," said Dr. E. Calvin Beisner, the founder of...