Why preamble was necessary in constitution of the Philippines?
The preamble is not an essential part of the Constitution. Notice that it is not one of the Essential requisites of a Good written Constitution. But it is important because it serves to provide an orientation or explanation of the context of the constitution.
The preamble serves as an introduction to the Constitution by stating the purpose of the document and what principles guide the content in it. Further, it explains in plain and understandable language why the authors felt it was necessary to write the Constitution and establish a republican government.
The Preamble of the Constitution of the Philippines serves two important ends: (1) It tells who the authors of the Constitution are and for whom it was promulgated; and (2) It states the general purposes which the Constitution and the government established under it intend to achieve, and the basic principles underlying the fundamental charter.