It is my belief, based partly on personal experience but partly also arrived at by looking around at others, that childhood lasts considerably longer… - Lewis Thomas

It is conceivable that we might be able to provide good medical care for everyone needing it, in a new system designed to assure equity, provided we can restrain ourselves, or our computers, from designing a system in which all 200 million of us are assumed to be in constant peril of failed health every day of our lives. In the same sense that our judicial system presumes us to be innocent until proven guilty, a medical care system may work best if it starts with the presumption that most people are healthy. Left to themselves, computers may try to do it in the opposite way, taking it as given that some sort of direct, continual, professional intervention is required all the time, in order to maintain the health of each citizen, and we will end up spending all our money on nothing but this.

Everything here is alive thanks to the living of everything else.

I agree that you might clone some people who would look amazingly like their parental cell donors, but the odds are that they’d be almost as different as you or me, and certainly more different than any of today’s identical twins.