36 The War on Aging are biologically extremely similar to us; They don’t talk, so if the biomedical imperative is sufficient society feels entitled to do more or less anything to them; They all age at least twice as fast as us. Because of this, a large colony of primates maintained under conditions  very  similar  to  those  under  which  we  maintain ourselves – the same range of diets, the same lack of exercise, and of course the same medical care, including all life-exten- sion treatments in use at the time – will be virtually certain to display any health-threatening characteristic of aging that we ourselves exhibit, at an age at most half that at which it appears in us. These primates will be the experimental recipients of succeeding generations of rejuvenation therapies. Some such therapies will have unforeseen side-effects that will kill some of the colony, which is why we will need such a large colony so as to maintain a sufficient number of them of an age suffi- ciently exceeding half the age of any human yet alive to ensure that our primate experiments succeed before their results are needed. Splendidly, this becomes progressively easier as time passes:  we  may  only  just  have  80-year-old  primates  before we  have  160-year-old  humans,  but  we  will  certainly  have 100-year-old primates some years before we have 200-year- old humans, and the lead-time improves forever thereafter. This strategy will be our most powerful defense against the unforeseeable biomedical challenges that our attainment of unprecedented ages will create.