What is the most esteemed service that a monk can do to the world ?
A true monkhood is based on protecting and practicing Buddha’s word as it is. It is monks’ great responsibility to practice Dhamma and teach others without distorting it. Inclusion of their own views is not necessary and should be regarded it as tainting the Buddha’s noble teachings. Then only the Dhamma would be prevailed for long time. Thus, the esteemed service a monk can do to the world is to practice and teach others Buddha’s teachings in its pure form.