If we believe we are the product of atoms, time and chance, we will conclude as Bertrand Russell:
"That Man is the product of causes which had no prevision of the end they were achieving; that his origin, his growth, his hopes and fears, his loves and his beliefs, are but the outcome of accidental collocations of atoms; that no fire, no heroism, no intensity of thought and feeling, can preserve an individual life beyond the grave; that all the labors of the ages, all the devotion, all the inspiration, all the noonday brightness of human genius, are destined to extinction in the vast death of the solar system, ...."
The potential of mankind in the mind of an atheistic evolutionist is summarized in the words of this great British philosopher and logician. In short, whatever we can achieve is meaningless and will be buried under the eventual collapse of our solar system.