"Dan Ben-David, executive director of the Taub Center for Social Policy Studies in Israel, said fertility rates in the Haredi community made the issue especially acute; the very religious Jews are the only group in Israel having more children today than 30 years ago. “They make up more than 20 percent of all kids in primary schools,” he said. “In 20 years, there is a risk we will have a third-world population here which can’t sustain a first-world economy and army.”"