In the nineteenth century the biggest threat to humanity was pneumonia,” he continued. “In the twentieth century it was cancer. The illness that will mark our era, and particularly the start of the twenty-first century, is insanity. Or, we can say, spiritual disease.” He paused. “This next century is going to be especially turbulent. It has already begun. And when I say ‘insanity’ and ‘spiritual disease,’ I don’t only mean inside the minds of individuals. Politics, military, economics, education, culture, and medicine—all these will be affected.