Figure 1 (IMAGE) University of Notre Dame Caption The researchers show that the larger the population of a society, the smaller its war group size, proportionally -- which means fewer casualties in a conflict. Credit University of Notre Dame Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.