Scholars are generally agreed that the evolution of Bhutan as a modern state can be attributed to four major events. These are, the advent of Buddhism in Bhutan with the arrival of Guru Padmasambhava in the 8th century AD; establishment of the Drukpa Kargue Sect by Phajo Drugom Shigpo in 13th century AD; the unification of Bhutan under a central authority by Shabdrung Ngawang Namgyal in 17th century AD and the coming about of a hereditary monarchy under ...
