Divided by language, customs, and tradition, some of these communities have engaged in endemic warfare with their neighbors for centuries.

Papua New Guinea's Western Province averages one person per square kilometer (3 per sq.

A considerable urban drift towards Port Moresby and other major centers has occurred in recent years.

The trend toward urbanization accelerated in the 1990s, bringing in its wake squatter settlements, unemployment, and attendant social problems.

[3] According to the 2000 and 2011 census, the most common places of origin for international migrants were the United States, Australia, the Philippines, and Indonesia.

The website Our World in Data prepared the following estimates based on statistics from the Population Department of the United Nations.