According to the preamble why are the states writing this declaration

The Preamble is the beginning to the Declaration Of Independence. The purpose of the Preamble is to state why the Declaration Of Independence was written. The document explains the reasons that impel the colonists to separate from Great Britain.

pan-africanism or pan-africanism is a political, philosophical, cultural and social movement that promotes african twinning, the defense of the rights of african people and the unity of africa under a single sovereign state, for all africans, both africa as of the african diasporas.