Jun 22, 2005 · The British Empire was the world's first global power and history's largest Empire; by 1921, it held sway over a population of 500–600 million people — roughly a quarter of the world's population — and covered about 15.1 million square miles (nearly 37 million square kilometres), roughly 35% of the world's total land area. Preamble → Summary It has become necessary for the 13 colonies to separate from Great Britain. These 13 colonies have the right to become a nation as legitimate as any other nation. Additionally, it is important to explain to the public, including those in other nations, why this declaration of independence is being made.