 The prehistory of Manila will be better understood when one views it from a macro level.Just like every other piece of land, the City of Manila started millions of years ago, even before it emerged by the Pasig River, as an integral part of the cataclysmic evolution in the development of the major geological framework of the Earth.Mainly, the causal relationship between Sierra Madre Range along the East coast of Luzon and the Central Valley in the middle of the mountain range and two other highlands, Zambales along the west and the highlands in the present provinces of Laguna, resulted to where the city stands now.