Objective morality is the task of making moral judgements on the basis of a standard we can agree on with others.
@ Cofty
I have already commented on the presupposition of convention in responding to TonusOh. One country says driving on the right side of the road is correct. Another country does just the opposite and states it is correct. So, convention cannot expalin objective atheist morality if it is just agreed upon rules.
We know the basic needs of other humans since we all share the same physiology.
But we don't all share the same physiology, so it is impossible for you to know anything based upon that explanation. My brain chemistry is different than your brain chemistry. Furthermore, in your world view why would I care about the basic human needs of others if we are simply chemical reactions?
Would you try to save the baking soda if you saw that it was periously close to coming into contact with vinegar? Would you feel bad and have regret if you did not? Of course not, I'm sure you would agree that is absurd.
Any other possible explanations for atheist objective morality?