It's pretty obvious you have never watched small children at play.
A young child has no conscience... evidenced by "MY toy!," I"M hungry!,"
Consideration for others, sharing and empathy are TAUGHT.
And one doesn't need religion to teach one right from wrong. If one doesn't know right from wrong, one lacks empathy - not religion.
And if one needs offer of a celestial prize in order to be good, they are selfish and will never truly be selfless.
If they need threat of eternal damnation, they are just as self-serving - as their "good acts" are only to keep their tail from the fire and not out of a true spirit of empathy.