America was a Godly nation.

The Declaration of Independence sets forth the great truth that "all men are created equal," and endowed with the inalienable right to "life, liberty, and the pursuit of happiness." And the Constitution guarantees to the people the right of self-government, providing that representatives elected by the popular vote shall enact and administer the laws. Freedom of religious faith was also granted, every man being permitted to worship God according to the dictates of his conscience. Republicanism and Protestantism became the fundamental principles of the nation. These principles are the secret of its power and prosperity. The oppressed and down-trodden throughout Christendom have turned to this land with interest and hope. Millions have sought its shores, and the United States has risen to a place among the most powerful nations of the earth. {GC88 441.1}
But the beast with lamb-like horns "spake as a dragon. And he exerciseth all the power of the first beast before him, and causeth the earth and them which dwell therein to worship the first beast, whose deadly wound was healed, .
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. . saying to them that dwell on the earth, that they should make an image to the beast, which had the wound by a sword, and did live." [REV. 13:11-14.] {GC88 441.2}
The lamb-like horns and dragon voice of the symbol point to a striking contradiction between the professions and the practice of the nation thus represented. The "speaking" of the nation is the action of its legislative and judicial authorities. By such action it will give the lie to those liberal and peaceful principles which it has put forth as the foundation of its policy. The prediction that it will speak "as a dragon," and exercise "all the power of the first beast," plainly foretells a development of the spirit of intolerance and persecution that was manifested by the nations represented by the dragon and the leopard-like beast. And the statement that the beast with two horns "causeth the earth and them which dwell therein to worship the first beast," indicates that the authority of this nation is to be exercised in enforcing some observance which shall be an act of homage to the papacy.
Such action would be directly contrary to the principles of this government, to the genius of its free institutions, to the direct and solemn avowals of the Declaration of Independence, and to the Constitution. The founders of the nation wisely sought to guard against the employment of secular power on the part of the church, with its inevitable result--intolerance and persecution. The Constitution provides that "Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof," and that "no religious test shall ever be required as a qualification to any office of public trust under the United States." Only in flagrant violation of these safeguards to the nation's liberty, can any religious observance be enforced by civil authority. But the inconsistency of such action is no greater than is represented in the symbol. It is the beast with lamb-like horns--in profession pure, gentle, and harmless-- that speaks as a dragon.

"Saying to them that dwell on the earth, that they should make an image to the beast." Here is clearly presented a form of government in which the legislative power rests with the people; a most striking evidence that the United States is the nation denoted in the prophecy.
But what is the "image to the beast"? and how is it to be formed? The image is made by the two-horned beast, and is an image to the first beast. It is also called an image of the beast. Then to learn what the image is like, and how it is to be formed, we must study the characteristics of the beast itself, --the papacy. When the early church became corrupted by departing from the simplicity of the gospel, and accepting heathen rites and customs, she lost the Spirit and power of God; and in order to control the consciences of the people she sought the support of the secular power. The result was the papacy, a church that controlled the power of the State, and employed it to further her own ends, especially for the punishment of "heresy." In order for the United States to form an image of the beast, the religious power must so control the civil government that the authority of the State will also be employed by the church to accomplish her own ends.

Whenever the church has obtained secular power, she has employed it to punish dissent from her doctrines. Protestant churches that have followed in the steps of Rome by forming alliance with worldly powers, have manifested a similar desire to restrict liberty of conscience. An example of this is given in the long-continued persecution of dissenters by the Church of England. During the sixteenth and seventeenth centuries, thousands of non-conformist ministers were forced to leave their churches, and many, both of pastors and people, were subjected to fine, imprisonment, torture, and martyrdom. {GC88 443.3}
It was apostasy that led the early church to seek the aid of the civil government, and this prepared the way for the development of the papacy,--the beast. Said Paul, There shall
"come a falling away, . . . and that man of sin be revealed." [2 THESS. 2:3] So apostasy in the church will prepare the way for the image to the beast. And the Bible declares that before the coming of the Lord there will exist a state of religious declension similar to that in the first centuries. "In the last days perilous times shall come. For men shall be lovers of their own selves, covetous, boasters, proud, blasphemers, disobedient to parents, unthankful, unholy, without natural affection, trucebreakers, false accusers, incontinent, fierce, despisers of those that are good, traitors, heady, highminded, lovers of pleasures more than lovers of God; having a form of godliness, but denying the power thereof." [2 TIM. 3:1-5] "Now the Spirit speaketh expressly, that in the latter times some shall depart from the faith, giving heed to seducing spirits, and doctrines of devils." [1 TIM. 4:1.] Satan will work "with all power and signs and lying wonders, and with all deceivableness of unrighteousness." And all that "received not the love of the truth, that they might be saved," will be left to accept "strong delusion, that they should believe a lie." [2 THESS. 2:9-11.] When this state of ungodliness shall be reached, the same results will follow as in the first centuries.
The wide diversity of belief in the Protestant churches is regarded by many as decisive proof that no effort to secure a forced uniformity can ever be made. But there has been for years, in churches of the Protestant faith, a strong and growing sentiment in favor of a union based upon common points of doctrine. To secure such a union, the discussion of subjects upon which all were not agreed--however important they might be from a Bible standpoint--must necessarily be waived.
Charles Beecher, in a sermon in the year 1846, declared that the ministry of "the evangelical Protestant denominations" is "not only formed all the way up under a tremendous pressure of merely human fear, but they live, and move, and breathe in a state of things radically corrupt, and appealing every hour to every baser element of their nature to hush up the truth, and bow the knee to the power of apostasy. Was not this the way things went with Rome? Are we not living her life over again? And what do we see just ahead?--Another general council! A world's convention! evangelical alliance, and universal creed!" When this shall be gained, then, in the effort to secure complete uniformity, it will be only a step to the resort to force. {GC88 444.2}
When the leading churches of the United States, uniting upon such points of doctrine as are held by them in common, shall influence the State to enforce their decrees and to sustain their institutions, then Protestant America will have formed an image of the Roman hierarchy, and the infliction of civil penalties upon dissenters will inevitably result. {GC88 445.1}
The beast with two horns "causeth [commands] all, both small and great, rich and poor, free and bond, to receive a mark in their right hand, or in their foreheads; and that no man might buy or sell, save he that had the mark, or the name of the beast, or the number of his name." [REV. 13:16, 17] The third angel's warning is, "If any man worship the beast and his image, and receive his mark in his forehead, or in his hand, the same shall drink of the wine of the wrath of God." "The beast" mentioned in this message, whose worship is enforced by the two-horned beast, is the first, or leopard-like beast of Revelation 13,--the papacy. The "image to the beast" represents that form of apostate Protestantism which will be developed when the Protestant churches shall seek the aid of the civil power for the enforcement of their dogmas. The "mark of the beast" still remains to be defined.
After the warning against the worship of the beast and his image, the prophecy declares, "Here are they that keep the commandments of God, and the faith of Jesus." Since those who keep God's commandments are thus placed in contrast with those that worship the beast and his image and receive his mark, it follows that the keeping of God's law, on the one hand, and its violation, on the other, will make the distinction between the worshipers of God and the worshipers of the beast.
The special characteristic of the beast, and therefore of his image, is the breaking of God's commandments. Says Daniel, of the little horn, the papacy, "He shall think to change the times and the law." [DAN. 7:25, REVISED VERSION.] And Paul styled the same power the "man of sin," who was to exalt himself above God. One prophecy is a complement of the other. Only by changing God's law could the papacy exalt itself above God; whoever should understandingly keep the law as thus changed would be giving supreme honor to that power by which the change was made. Such an act of obedience to papal laws would be a mark of allegiance to the pope in the place of God.
The papacy has attempted to change the law of God. The second commandment, forbidding image worship, has been dropped from the law, and the fourth commandment has been so changed as to authorize the observance of the first instead of the seventh day as the Sabbath. But papists urge, as a reason for omitting the second commandment, that it is unnecessary, being included in the first, and that they are giving the law exactly as God designed it to be understood. This cannot be the change foretold by the prophet. An intentional, deliberate change is presented: "He shall think to change the times and the law." The change in the fourth commandment exactly fulfills the prophecy. For this the only authority claimed is that of the church. Here the papal power openly sets itself above God. {GC88 446.2}

Source :Great Controversy pages 441-446 Ellen G white 1888