However, the political and ethical theories of Confucian classical curriculum have also been likened to the classical studies of humanism in European nations which proved instrumental in selecting an "all-rounded" top-level leadership. British and French civil service examinations adopted in the late 19th century were also heavily based on Greco-Roman classical subjects and general cultural studies, as well as assessing personal physique and character. US leaders included "virtue" such as reputation and support for the US constitution as a criterion for government service. These features have been compared to similar aspects of the earlier Chinese model. In the British civil service, just as it was in China, entrance to the civil service was usually based on a general education in ancient classics, which similarly gave bureaucrats greater prestige. The Cambridge-Oxford ideal of the civil service was identical to the Confucian ideal of a general education in world affairs through humanism. Well into the 20th century, classics, literature, history and language remained heavily favoured in British civil service examinations. In the period of 1925–1935, 67 percent of British civil service entrants consisted of such graduates.