It's striking that Native Americans evolved no devastating epidemic diseases to give to Europeans in return for the many devastating epidemic diseases that Indians received from the Old World.
The history of interactions among disparate peoples is what shaped the modern world through conquest, epidemics and genocide. Those collisions created reverberations that have still not died down after many centuries, and that are actively continuing in some of the world's most troubled areas.
"To take a specific example, a researcher in the Journal of Traumatic Stress interviewed 129 women with documented histories of child sexual abuse that occurred between the ages of 10 months and 12 years. Of those, 38 percent had forgotten the abuse. Of the remaining women who remembered, 16 percent reported that they had for a period of time forgotten but subsequently recovered their memories. [46] Thus, during that time a "false negative" recorded for those women. These are the sort of distinctions for which Elaine Showalter in Hystories: Hysterical Epidemics and Modern Media fails to account."