Conflict produces population cycles (IMAGE) Complexity Science Hub Caption In the top graph, simulated populations under climate variation and no inter-group conflict (in red) are compared to population distributions from observed radiocarbon data (in grey). There is no match. The bottom graph shows simulated populations under inter-group conflict and climate variation (in red), compared to population distribution from observed radiocarbon data (in grey), with a good match between the two. Credit Complexity Science Hub Usage Restrictions Use with credit License Original 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.