Tuberculosis, smallpox, dysentery, the plague were just part of the natural order of things, God’s will. All you could do was go to church and pray that it didn’t happen to you. It wasn’t until doctors understood that diseases were caused by something, like viruses, bacteria, the environment, that it became possible to prevent or cure them. Now we are at the same point in regard to aging. Aging which has long been thought of as inevitable, part of the human condition, can now be seen as a disease for which there are causes and treatments. Fortunately we humans do not accept the natural order very easily. If we did we would still be living in caves and hunting with spears and stones. But we are an animal that changes it’s environment, and by changing it’s environment, we change nature. We have rewritten the rules of disease, and with growth hormone replacement, we are re-writing the rules of biology and aging.