Robbie Etheridge’s book titled Mapping [this civilization’s] Shatter Zone examined the impact of slave raids on the collapse of its political system. This civilization produced a set of eight copper plates called the Wulfing cache which depict beings with human and avian features. The long-nosed god was a common motif in maskettes from this civilization that were often made from lightning whelk shells. It's not on Easter Island, but the (*) birdman motif (-5[1])used by this civilization’s Southeastern Ceremonial (10[1])Complex prominently depicts people playing a hoop-and-stick game called chunkey. One of this civilization’s settlements contained numerous timber circles as part of its “Woodhenge” and was centered on Monks Mound. For 10 points, name this culture that built Cahokia along the longest river in the United States. ■END■ (10[1])