I was recently talking with my sister (who walked away from the faith and became an atheist) about Christianity and atheism. During that conversation I brought up that atheism has no rational grounds for morality, that morality comes from God, and that He implanted a sense of morality within us. She countered with essentially this: That morality evolved to help us survive together when our ancestors lived in tribes and such. That over time, we developed a moral compass that helps us survive, because if we’re good to each other then that will help humanity survive, and she believes survival is the ultimate purpose of the human race. So, drawing from Ravi’s argument of goodness + evil = a moral law = a moral lawgiver, which is God, she believes that the moral lawgiver is the need to survive, which then caused us to form a sense of morality in which people are valuable (as a tangent, she also said that people are valuable because they are the same species as us, and as such have intrinsic worth to other humans). Unfortunately, I couldn’t think of a rebuttal to this and I’m in need of an answer.
Thank you all, and please pray for my sister, that God will bring her back to Him in His perfect timing.