Can Atheism ground objective morality?

[The Tanager]

In my exploration and discussions, I have not seen an atheistic worldview be able to logically account for morality being objective. The closest I've seen is an atheistic platonic kind of moral system, but while that seems to be able to account for the existence of 'good' and 'evil', it still doesn't seem to account for why humans would be obligated to choose Good over Evil. I'd love to hear cases from those who think atheism can account for objective morality to make sure I haven't missed (or misunderstood) thoughts in my exploration.

[William]

[Replying to William in post #29]

That morality is objective, i.e., that moral truths exist independent of a mind's perception of it. This thread asks the question: assuming atheism is true, could one's atheistic worldview rationally ground morality being objective?

Dear Jason.

Given what atheists have already contributed to this thread, they have yet to provide any working rational ground for morality being objective.
I as a theist cannot do so either and both have asked the same question of you, the gist of it being "what do you mean by objective reality?"

THe OPs question cannot be answered in any meaningful way while the subject matter defies explanation.

Having reached this loop with you, I withdraw. Perhaps this thread will float but I suspect it may well sink.

All the best in your seeking your answer...