The Shah's reign is sometimes divided into periods. During the first period, which lasted from 1925–1932, the country benefited greatly from the contributions of many of the country's best and brightest, to whom should accrue the credit for laying the foundations of modern Iran. All the worthwhile efforts of Reza Shah's reign were either completed or conceived in the 1925–1938 period, a period during which he required the assistance of reformists to gain the requisite legitimacy to consolidate this modern reign. In particular, Abdolhossein Teymourtash assisted by Farman Farma, Davar and a large number of modern educated Iranians, proved adept at masterminding the implementation of many reforms demanded since the failed constitutional revolution of 1905–1911. The preservation and promotion of the country's historic heritage, the provision of public education, construction of a national railway, abolition of capitulation agreements, and the establishment of a national bank had all been advocated by intellectuals since the tumult of the constitutional revolution.