“…As has been argued elsewhere, the frequency of fortification construction over time could also be explained as a product of population growth and evolving cultural complexity (Earle, 1991;Johnson and Earle, 1987;Kirch, 1984). Hawai'i has often been used as a model for this mode of development, as it is thought to have generated a dense population near the end of the prehistoric period, which also appears to be the time that fortifications and fortified caves were developed (Hommon, 1986;Kolb and Dixon, 2002). However, equally large and diverse archipelagoes such as New Caledonia and Vanuatu lack fortifications, despite their long histories of colonization and potentially high population levels.…”