Based on ground-breaking research by Field Museum scientists and
others, The Ancient Americas will shatter long-held preconceptions.
Visitors will see for themselves the intelligence and creativity that
distinguish human beings, the innovations that allowed groups to diversify
and populate the hemisphere from the Arctic to the tip of South America,
and the great cities, trade networks, and sophisticated cultures built by
Indigenous Peoples long before Europeans decimated their populations and
imposed their own cultures on these lands.
"shatter long-held preconceptions"? Of what? Held by whom? Hard to tell from this. Presumably, the idea of culturally and technologically simple aboriginal groups, which might be the popular conception?