Compensation law
\ˌkɑmpənˈseɪʃən\ \lɔ\
The compensation law of mortality (or late-life mortality convergence) states that the relative differences in death rates between different human populations decrease with age.
This is due to the higher initial death rates in disadvantaged populations being compensated by a slower pace of mortality increase with age. This law relies on the assumption that there is a biological limit on life.