You will need to google it to find out more, but this week, the scientific world finally announced that they have evidence from DNA samples, that genetically speaking, prehistorically rooted Neanderthals were mated with by early man/early woman and as a result, a new species was born - and/or evolved for it ( details of which you will discover on google if you want to read up on it).
These are brand new DNA findings which reveal the indisputable evolution of man. As to whether or not it is solely responsible for modern mans existence was not an item on the scientific agenda.
Interesting though, considering your own point of view.
