Great point. But if this is true the implication is that we are already limited by our natural ability to delay gratification? Furthermore, will we inherit this ability on our children. So they will be constrained too?
I don't know the answer to this, but I suspect that you can teach gratification deferment to many children who currently don't naturally have it -- though there will always be people who are unreachable.
I'm thinking children here because at least in my anecdotal experience, I've had no luck getting any of the poor adults I know to show even the most basic ability. Children can be more malleable in this way.
