New Guinea has a very harsh environment and people many of whom are spread throughout the country in small primitive village environments. Their way of life is very much controlled by what living they can make directly from their surroundings and this puts a limit on the amount of people that can be supported To have populations like those in the more developed country's (even the poorest of them a lot of infrastructure needs to exist in the first place to support them. this is at present lacking in PNG, besides any wealth that either PNG or Irian jia is certainly being wroughted out of the country by either Australia or Indonesia. Indonesia is even stealing the land from the locals by chasing them into the bush.
the worlds most populous nation is china ;)
Yes, China is the worlds most populated country with a population of 1.3 billion.
China
human beans
Pitcairn Islands
The Vatican City (yes it is a nation!)
15 Years
Tokyo, Japan is the world's most populated city that lies on a longitude of 140.
they can be found in PAPUA NEW GUINEA
Asia, who hosts about 60% of the human population.
Egypt
Rome.