I have never seen the conflict that some people maintain exists between an atheistic worldview and the presence of human morality. This Scientific American article, on a recently-published PLOS One paper, suggests that humans are actually inspired to be moral by science:
Researchers at the University of California Santa Barbara…hypothesized that there is a deep-seated perception of science as a moral pursuit — its emphasis on truth-seeking, impartiality and rationality privileges collective well-being above all else.
Across…different measures, the researchers found consistent results. Simply being primed with science-related thoughts increased a) adherence to moral norms, b) real-life future altruistic intentions, and c) altruistic behavior towards an anonymous other.