Gordin concludes Deloria's rejection of the Bering land bridge and "attack on any affinity between Native tradition and Western culture and science" was derived from Velikovskian catastrophism, though Velikovsky himself rejected any hint of creationism.
Gordin contends that Deloria's opposition to the Bering land bridge theory and his criticism of the connection between Native American traditions and Western culture and science stemmed from Velikovskian catastrophism, even though Velikovsky himself rejected any suggestion of creationism.