Answer:
By a Chiefdom with a strict social hierarch
Step-by-step explanation:
Mississippian society lasted until the 1600s when the Europeans came. The society which was built around the river Mississippi was characterized by various socio-political identity amongst which is the advancement of the chiefdom socio-political statuses with a strict level of social hierarchy.
Hence, By a Chiefdom with a strict social hierarchy, was how Mississippian society organized by the time of European contact