Archaeological finds in Palawan (e.g., Tabon skull fragments) suggest that there were already prehistoric inhabitants in the Philippines as early as the Pleistocene period
Through carbon dating, the fossil remains were believed to be about 22,000 years old
In the Philippine cultural landscape, the New Stone Age was the impetus of the development of Filipino modern societies
At this point, early Filipinos were starting to domesticate plants and animals, and food production was no longer limited to family consumption
At that time, people were dependent on agricultural as well as hunting and gathering activities
Internal human evolution hypothesis
The work of Gaillard and Mallari (2004) summarized the different schools of thought to explain the peopling of the Philippines. This hypothesis argues that there was an internal development happening within the so-called Austronesian region (citing the work of William Meacham)