The Manhattan Declaration

The Manhattan Declaration's key paragraph:

Because the sanctity of human life, the dignity of marriage as a union of husband and wife, and the freedom of conscience and religion are foundational principles of justice and the common good, we are compelled by our Christian faith to speak and act in their defense. In this declaration we affirm: 1) the profound, inherent, and equal dignity of every human being as a creature fashioned in the very image of God, possessing inherent rights of equal dignity and life; 2) marriage as a conjugal union of man and woman, ordained by God from the creation, and historically understood by believers and non-believers alike, to be the most basic institution in society and; 3) religious liberty, which is grounded in the character of God, the example of Christ, and the inherent freedom and dignity of human beings created in the divine image.

If you agree with these points, you can sign it online.