Final answer:
Native American social structures were undermined by Native American population losses resulting from disease and exportation.
Step-by-step explanation:
Upon contact with Europeans, Native American social structures were undermined by Native American population losses resulting from disease and exportation. The introduction of European diseases, such as smallpox, had a devastating impact on Native American populations, who had no immunity to these diseases. Smallpox, diphtheria, and measles spread among indigenous American tribes, decimating their populations. This loss of life led to a decline in Native American communities and the disruption of their social structures.