Why would any one think this question is meaningful? (below) Surely morality is only objective when your current language community agree on its precepts; I don't know any atheists that would claim an "objective morality" is a viable claim beyond this, and most lean towards accepting that moral systems are contingent upon cultural norms, as such they are relative. "In conversations with Christians (and members of other religious groups), more often than not I'm asked on what grounds atheism can claim to have an objective morality. This isn't a new question, but it is one I don't feel properly equipped to answer well. I think reason and our intuitions can aid us in finding objective moral truths, but I often find myself at a loss articulating a good defense. I do not find the theist's claim that morality depends on God's existence a good one, but I want to advance a better argument for why secular morality works out, and not just knock down their view. What's the general consensus among philosophers? Is there a firm foundation for morality without God?"