Apologies, that certainly wasn't the intended implication. Without getting right down to genetics, which is ill advised with most theists, it can be shown that selfishness can lead to harmony, cooperation and what we see as 'morality'.
1) Organisms are inherently selfish.
2) Selfishness in itself does lead to harmony, cooperation and 'morality'
For instance the shark does not eat the fish that swims into its mouth because it ultimately cares about the fish, but that the fish removes the stuck bits of meat from between its teeth. The fish doesn't care about the shark, it merely wants the food that is stuck therein.
From a distance it can loook quite magnificent and can easily be confused that these organisms have each others feelings in mind. Indeed many theists do make similar mistakes with regards mainly to humans.
Selfishness is inherent and is seen in every action. When this is stated some people typically come up with the "why did the man jump into the river to save the stranger?", indeed ggazoo said that very thing back on post 249, but then showed the case for selfishness in the very same sentence:
"If we see a total stranger fall in the river we jump in after him, or feel guilty for not doing so"
We should all know the serious detriment guilt can play in our lives, and those that jump in the river, (I probably wouldn't unless it was a child), clearly recognise that the guilt would overtake their life.
People claim it altruistic, (showing unselfish concern for the welfare of others), but that is not the case. It is selfish, it just doesn't look that way until you give it some thought.