I continue to see atheists attempt to answer the question, "How do we motivate people to do good and to not do evil without appealing to some type of God?" by saying, "We are biologically disposed to be motivated to do good and not do evil."
Which doesn't answer the question.
In fact, it misses answering the question by such a huge margin that it legitimately causes those who ask the question to wonder as to the mental competence of those who provide this answer.
"Well, thank you for that piece of information. You have now demonstrated that you suffer from a complete disconnect from reality."
People who are interested in the motivation to do good and avoid doing evil are not interested in in motivating people to do good that we are biologically compelled to perform, or the evil we are biologically incapable of performing.
They are concerned with the very real goods and evils that surround us every day and that can be found in huge quantities by any study of history. They are concerned about the evils that we are clearly biologically capable of committing because we have historical examples of people committing them.
The question is, "How do we motivate people to do good deeds that they are clearly capable of not performing?" and "How do we motivate people to avoid doing those evils that people all to often do to each other?"
The claim is that a God can give the people a motivation to do these goods and avoid these evils and that no other effective method exists.
To answer this question by saying that, "Biology compels us to do good and avoid evil," then gets answered with, "What? You're telling me that slavery, genocide, murder, child rape, spousal abuse, tyranny in all of its ugly forms . . . that none of these things ever happened because biology makes it impossible for humans to do evil?"
Well, clearly, you don't mean that.
However, because you don't mean that, any appeal to the biology of altruism . . .
DOES NOT ANSWER THE QUESTION.
The question is - the legitimate real-world worry is - how do we prevent these things from happening without appealing to a God?