Konbaung kings extended Restored Toungoo's administrative reforms, and achieved unprecedented levels of internal control and external expansion. For the first time in history, the Burmese language and culture came to predominate the entire Irrawaddy valley. The evolution and growth of Burmese literature and theatre continued, aided by an extremely high adult male literacy rate for the era (half of all males and 5% of females). Nonetheless, the extent and pace of reforms were uneven and ultimately proved insufficient to stem the advance of British colonialism.