The World Health Group finds "no general arrangement around the age at which a person becomes old." Most "designed countries" established the age as sixty or 65. However, in establishing countries incapability to make "Energetic contribution" to society, not chronological age, marks the start of old age. This is dark, https://men-s77665.tinyblogging.com/5-year-old-child-psychology-for-Dummies-57252058