Clean city water supplies have been one of the most significant public health advances of the last 100 years. The municipal water supplies and equally significantly, the water treatment plants have virtually eliminated many of the diseases of the 19th century that plague both urban and rural life.
Crime is often viewed as young man's game. As people age, they become less likely to engage in criminal activities. Punishment of young offenders has become increasingly draconian, as the option to try and sentence juveniles as adults allowed more youth to face potentially lifetime adult sentences.