Posted 20 November 2012 - 06:03 PM
That is a curious finding surely demanding of more research and explanation. I would tend to go with the possibility that this has something to do with brain development and identity? There has to be a biological connection, because a primate's mid life comes much sooner than a human mid life. That means there has to be an internal clock. A human brain is not fully developed until around age 25, but even at this point there are physical changes in the brain, depending on how the brain is used, with some areas of the brain becoming strong and others atrophying if not used. Around age 30 it is said our sense of identity becomes fixed, but our roles in life change as we become parents, move from new employee to manager, our children leave home, etc. Each change forces us to think about who we are and how we "should" behave, but there is a self, an ego that experiences these changes. We end up in old bodies with young people inside, thinking, "well, this is interesting, how did I get here?"
I vividly remember wondering if there isn't some more to life. If I should change my life in some major way, before it is too late!. Laugh, middle age is that panic, and finally accepting our lives are what they are. This can involve a grieving as we let go of the past and dreams that will never be fulfilled. If primates do this too, they care more complex than we have imagined. I remember a lot of stress and discontent during this time. Finally, and perhaps for biological reasons, indicted by the research, all that didn't matter any more. Yes, I would say I enjoy a freedom from all that, and happiness is now that piece of chocolate I probably shouldn't eat, not a desire for the great house I do not have. I don't have the energy to chase those dreams, and this may explain why we settle for that piece of chocolate? Many old women, love dressing to be comfortable instead of a need to be attractive. It is like when I was young life was something outside of me and I was driven to get it. Now I am full of life. That equals contentment and happiness with our little sins, such as an after noon nap. I can see how this could happen for other social animals as well.
I like the self examination triggered by this thread. Perhaps our goal should be to be in harmony with life? What if we entered the very trying years, knowing we will naturally feel better about our lives, regardless of what we do or don't achieve. Would this knowledge make it easier to get through the more challenging time? Hum, perhaps not. Letting go of dreams was not easy, but accepting life as it is, is wonderful. On second thought, thank social decisions that mean I have a very comfortable life, compared to being homeless. I don't think I would be happy if I were on the streets. Many more disabled and older people would be homeless if it were not things Social Security and assistance programs. Hum, experiment, to what degree might happiness depend on the quality of civilizations, and having a good position in that civilization? Do these animals do was well in later years in the wild?