In order to deepen our understanding of contemporary social structures, we must often trace their distant origins in our evolutionary past. The origins of two structures are analyzed here. Both religion and collective ascription are shaped in part by a common imperative to access rewarding emotional arousal release protected by a special set of arouser screening rules. Only certain enhanced arousers with an attractive ratio of contrast values to access costs can regularly tap these emotional reservoirs. In these two cases, it is the larger social group context that must supply the enhancements. The result is that some group processes are marked by emotional dynamics deeply rooted in the pursuit of these extraordinary arousers.

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