one small problem with your thesis. there are no transitional fossils. The human being found in the neander valley has been a perpetrated as something other than he truly is. Point in fact, he stood erect averaging 6 feet tall, stronger boned and more muscular than us, and his cranial vault on the average was larger than ours @ 200cc. Comparative psychology has provided us with a relational coefficent that states the larger the cranial vault, the larger the grey matter, the more intelligent the specie. So, in reality, what we call Neandertal man was in fact faster, stronger, smarter then we are. You may want to pick up the book "Bones of contention" by Lubenow before you venture any further down the evolutionary tree of deception perpetrated by the paleoanthropologist whom are wrought with fraud. Homo erectus, Neandertal man, homo sapiens were all found at Sima de los huesos "pit of the bones' in Madrid Spain in 1994. It was found that they were all contemporaries, different races of mankind living as neighbors. You may want to research your premise so your foundation is on solid ground. Another book you would be interested in is 'the puzzle of ancient man' by chittick.