I can most certainly agree with Ivan Van Sertima that "We Came Before Columbus;" but I have strong doubts that those kingdoms/civilizations in the Americas "Came Before Kemet" as some authors may hypothesize.
Science has even attested that LIFE (Mitochondrial Eve) originates in AFRICA.
So, I have strong mis-givings that Africans developed the Americas BEFORE we developed AFRICA.
Where has Van Sertima stated that Afrikans in the Amerikas developed before we developed Afrika?
From most of what I have read that is written by Van Sertima he has shown links to the Mande speaking Malian Moors, and an earlier group from around 800 BC.