Sixteen of the top scholars on family life have re-issued a joint report on the importance of marriage. First released in 2002, the newly revised edition highlights five new themes in marriage-related research. "Why Marriage Matters, Second Edition: 26 Conclusions from the Social Sciences" was produced by a politically diverse and interdisciplinary group of leading family scholars, chaired by W. Bradford Wilcox of the University of Virginia. Since 1960, the proportion of children who do not live with their own two parents has risen sharply-from 19.4% to 42.3% in the Nineties. This change has been caused, first, by large increases in divorce, and more recently, by a big jump in single mothers and cohabiting couples who have children but don't marry. For several decades the impact of this dramatic change in family structure has been the subject of vigorous debate among scholars. No longer. These 26 findings are now widely agreed upon.