Which speech embodies the principle that all men are created equal?

The speech that embodies the principle that all men are created equal is the Declaration of Independence. This foundational document, drafted by Thomas Jefferson in 1776, contains the famous phrase that "all men are created equal," which reflects the Enlightenment ideals of individual rights and equality. The Declaration articulates the belief that every person is entitled to certain unalienable rights, such as life, liberty, and the pursuit of happiness.

While the Gettysburg Address delivers a powerful message about equality, especially in the context of the Civil War and the fight for freedom, its primary focus is on the sacrifices made by soldiers and the importance of ensuring a "new birth of freedom." Similarly, the Emancipation Proclamation and the Bill of Rights address important issues of freedom and rights but do not explicitly declare that all men are created equal in the same foundational context that the Declaration of Independence does. Thus, the Declaration is the most direct articulation of this principle.