I think that all human systems require continuous renewal. They rigidify. They get stuff in the joints. They forget what they cared about. The forces against it are nostalgia and the enormous appeal of having things the way they always have been, appeals to a supposedly happy past. But we've got to move on.
Most people think, "Life sucks, and then you die. " I disagree. I think life sucks. Then you get cancer. Then you go into chemotherapy. You lose all your hair, you feel bad about yourself. Then all of the sudden the cancer goes into remission, and then all of the sudden you have a stroke. You can't move your right side. And then, maybe, you die.