The apparent length of time between the emergence of human beings (c 250,000 years ago) and human creativity, which today defines us, raises immense questions about human development and potential. Rebecca Wagg Sykes attempts in Kindred: Neanderthal Life, Love, Death and Art to answer that by looking at homo sapiens relationship to Neanderthals. This is further discussed in The New York Review where the idea is expressed that we human beings are hybrid, and it is our coupling with other human species that created human potential.
Is this right or are there perhaps better explanations? Were Neanderthals too different from us to warrant this explanation