Haldane, the famous British evolutionary biologist, was a pioneering figure, beginning in the s, in the endeavor to present information on scientific topics to the British public. The first edition is now over half a century old, but The Biology of Senescence is still a remarkable book to read today. It has been almost impossible to measure aging processes of animals in nature. Alex Comfort was very aware of the prevailing fantasy of immortality in American culture but, as we shall see, he was also realistically optimistic about lengthening the human lifespan. The age of horses, because they are domesticated animals, had been long been recorded, although the accuracy of records had not always been reliable. As an agony aunt, I was happy to recommend Comfort's books rather than my own because they were so effective. Comfort, Biology Gerontology was not an important field of study until Alex Comfort came along. One of the main reasons that doctors are an effective force for change if they wish to be is that they have no time—assuming them to be doctors, not medical politicians on the way up—to strike ideological attitudes. I have had a life-long interest in the work of Alex Comfort. We all like new medical gizmos and demand that policymakers make sure they are paid for. He points out the tragedy of perpetuating socio-genic aging: The Long Sexual Revolution: In that movie, the sex manual is now called "Joy in Sex".