Pope Leo honored the semiquincentennial by writing a letter to his fellow citizens and wishing them to continue to be inspired by the Spirit of 1776. 'This semiquincentennial marks that defining moment in the history of the United States of America, July 4, 1776, that gave enduring voice to the ideals of liberty, equality, the pursuit of happiness, justice and democratic self-government. Defending human life also includes welcoming, protecting and assisting immigrants, whose hopes, sacrifices and contribution have formed part of the history of this country from its very beginning".