Human Evolution: Past and Future

Very interested in your course about evolution. Back in the 50's or 60's I remember reading a paper of these people in Africa that use to live in the hills and then came down to the plains and flourished. Then the British came sling and pushed them back to the hills where they eventually regressed. Is this possible to regress? I am a native Peruvian but have lived fir over 40 years in the USA, ND am an American Citizen. However I came back to Perú after retirement as my mother was in her early 99's and I knew she could get better care here in Lima than in the States and cheaper too. Benn in Lima since 2005. Perú has great history and contribution to world development of pre-Columbian America. Recently they found Caral, north of Lima which in reality is the Ur of the Americas. It bothers me terribly when people say that the Incas didn't have writing. True they did not have paper and pencil but they had Kipus, these were strands of woolen/cotton threads l attached to a main horizontal line and all the other strand hanging vertically. And these vertical strands have knots at different levels, plus the knits are different from each other, some twisting to the right, others ti the left, din crisscrossing . In effect during the Inca Empire there were the Kioukamayocs who could read these. Unfortunately these teachers are long gone and no one yet has been able to decipher them. As literature in it's many facets are part of the culture of a people, when this is taken away the loss us tremendous. The Spaniards conquered thee indians and were treated very bad and they had no culture to unite them except temples and idols which were demolished by the conquerors si the original oriole if Perú were lost without any culture if their own. Consequences this is the social problems we have with this population which we considered backward and lost. Religion played a very bad role also. Not the Inca but our Western religion myths.
I would very much enjoy reading about the new DNA biology and how it can help us understand how we have evolved and keep evolving.
Carlos Cueto-Rejas.