While universal suffrage is becoming more common, there are age restrictions, obviously, associated with it. In the United States that age was 21 years of age for most of the country's history, but it was changed to 18 starting with the 1972 Presidential election. | While universal suffrage is becoming more common, there are age restrictions, obviously, associated with it. In the United States that age was 21 years of age for most of the country's history, but it was changed to 18 starting with the 1972 Presidential election. |