Final answer:
The purpose of writing the constitution in the England - 1215 preamble is to establish a more perfect Union, ensure justice, provide domestic tranquility, defend the common defense, promote the general welfare, and secure the blessings of liberty for themselves and future generations. The constitution is written to protect the rights and freedoms of the people, both presently and for the posterity.
Step-by-step explanation:
The purpose of writing the constitution mentioned in this preamble is to establish a more perfect Union, ensure justice, provide domestic tranquility, defend the common defense, promote the general welfare, and secure the blessings of liberty for themselves and future generations. The constitution is being written to protect the rights and freedoms of the people, both presently and for the posterity.