He excluded elderly with lower income, inability to be independent, and elderly with physical or mental illness from rest of his studies group. Cumming denied the conception of disengagement is based ill health, and that studies on lower income elderly were considered unhelpful. In second essay, Arnold M. Rose helped explaining the disengagement theory by stating that "disengagement is inevitable, because death is inevitable"(Rose 41). It also help clarified that the theory suggests that each side, society and elderly, are preparing in advance for death, so when it comes, when they die, they would have been readied. In this book, he also mentioned 3 important criticism for it. First of all, modern technology changes and people now have longer life expectancy, now there are more healthy elderly and it will increase the participants population compare to the original scales, so the variable for the study increased. Also, it was shown that when Dr. Cumming chose his participant, most of the time, the disengaged elderly he found were disengaged before the study was executed. The next criticism is