Well from the days in past to the present, there is lot industralization, communication, economy, nuclear weapons, tanks and global power. Even now most people around the globe might not know Nepal is country if there was not highest mountain or Buddha. Population has grown which has now make uncountable persons to sucking country but these blood sucking ticks were sucking blood since the 250 yrs, since the general population of the country itself was countable. Some kings did worry about their citizens and development but lot of them were involved in their own fantasy and luxury.