This great American nation the Almighty raised up by the power of his omnipotent hand, that it might be possible in the latter days for the kingdom of God to be established in the earth. If the Lord had not prepared the way by laying the foundations of this glorious nation, it would have been impossible (under the stringent laws and bigotry of the monarchical governments of the world) to have laid the foundations for the coming of his great kingdom.
The Lord has done this. His hand has been over this nation, and it is his purpose and design to enlarge it, make it glorious above all others, and to give it dominion, and power over the earth, to the end that those who are kept in bondage and serfdom may be brought to the enjoyment of the fullest freedom and liberty of conscience possible for intelligent men to exercise in the earth.
(Joseph F. Smith, Gospel Doctrine, p. 409)