Final answer:
The first key element of the English Bill of Rights of 1689 is the freedom of speech in Parliament, a document that greatly influenced later democratic principles, including those in the U.S. Constitution.
Step-by-step explanation:
The first key element of the English Bill of Rights of 1689 is the freedom of speech in Parliament. This pivotal document established a constitutional monarchy and included several provisions, such as the right to freedom of speech for members of Parliament, the right to a writ of habeas corpus, and the right not to be subjected to cruel and unusual punishment. The English Bill of Rights had a profound influence on the drafting of the United States Constitution and its own Bill of Rights, reflecting the essential protections and liberties that were considered important for a free and just society.