Well there are some serious ramifications that are without historical precedent. For example, without menopause it may perhaps become the norm for women to wait until retirement to have kids. It may in fact be the case that couples will work for 40 years, have a 25-30 year retirement where they raise a cohort of children, and then re-enter the work force for a new career. Certainly families are going to start representing smaller and smaller percentages of the population as birth rates decline while people get older and older without dying. The social ramifications alone will be huge, which was more along the lines of what I was talking about.