title: A new theory about the ages of man.
abstract: Genetic psychologists who have long been studying the periods of growth in the ages of Man, endeavoring to determine their average durations, set the limits separating these periods empirically, and do not pursue their study beyond childhood and adolescence. In my book published in Paris (1986) I propound a new, radically different approach which takes into account Man's whole lifespan, without separating the various ages, and without separating old age from those that precede it. According to my theory, the Ages of Man, nine in number, all follow the same mathematical law, which determines their respective durations on the basis of a geometrical progression, ratio two. Their durations would be of three and six months for gestation, one, two, four, and eight years for childhood and early adolescence, sixteen for youth, thirty-two for adult maturity, sixty-four for old age. This amounts to a theoretical potential lifespan of 127 years.
authors.affiliation: Lyons University, France.
authors.forename: R S
authors.initials: RS
authors.lastname: Guyot
mesh_terms: D000293:Adolescent; D000328:Adult; D000375:Aging / Q000502:physiology*; D002648:Child; D006801:Humans; D007223:Infant; D010684:Philosophy